I'm A Banana
Potassium-Rich
So, the L&L column this week has me thinking about ways that groups can opt into changing the tone of their game, without it being forced, and I think the title gives you the handy-dandy shorthand for my idea here. 
Basically: The DM decides when and if such a change happens, by rewarding a tier-change as treasure.
What do you think?
Longwinded Diatribe
So, say everyone starts out in the "Zero" tier of the zero-to-hero-to-demigod continuum. You're a first-level street sweeper/rat slayer.
BUT WAIT! Your DM wants you to feel like a hero right out the gate, so he awards every character Heroic Tier right off the bat. That means that you come with increased reputation, increased capabilities, and better-than-average ability. You're no mere rat-slayer, now you've killed trolls! You're the best swordsman in town! Go you!
So you go on a few adventures -- maybe one, maybe 6,000. When the DM decides he's had enough of everyone being heroes, he thinks, "Well. Time to change things up," and after your next troll-murdering holiday, he awards you, say, Champion Tier.
Champion Tier comes with a keep. And followers. And land management. You're a fancy-arse lord now, and while you can still go off and slay trolls, you may have bigger concerns. Or not. Really depends on how tired you are of this or that.
After a few months of this, the DM decides to take it up a Notch, and make you Minecraft Tier. Wait.
Try that again: After a few months of this, the DM decides everyone has had enough of peasant revolts and pits the party against a great dragon. Amongst the dragon's items is a mystical artifact that can grant godhood. You've now been awarded Epic Tier. Awesome. You're the best thing this world has to offer. Orcs can no longer threaten your pies.
What This Means for Numbers
Basically, this is E6. With Speedbumps. You can spend 10 or 20 or 30 or 40 or whatever levels in the Zero Tier, without ever changing the way your game is played. At a certain point (circa level 5? level 10?) you stop gaining vertical increases (your Gettin' Stuff Done +5 doesn't become +Gettin' Stuff Done +6 at your next level, it stays +5), and you instead gain breadth (your Gettin' Stuff Done +5 is joined by, say, Also Chewin' Bubblegum +3).
When your DM is genenerous and makes you a hero or a lord or a god, you cross the speedbump. Now you gain vertical increases start racking up again -- you can increase your +5 all the way up to +10. Then, you hit another speedbump (plateu, mortal threshold, whateverthehell). You can't get to +11, though you can get a lot of different +10's.
What This Means For DMs
You control your game's feel. Simply by virtue of awarding XP, your game's style never has to change. If you want to start off the game higher-powered, maybe play as gods for a while, you don't need to start at level NINE THOUSAAAAAND, you can simply be level 1, and have the Epic Tier award. If Zero doesn't appeal to you, start at level 1, and have the Heroic Tier award.
You can stay within that feel forever, if you want. You control the precise point at which the game changes.
Because of that, you can also make BIG TIME awards. Give your players a Tier, and it will feel magifnificent. You don't scrimp and save for your keep on the borderlands, purchasing it by the GP, your DM hands it to you on a silver platter and says, "Congrats. You're a king. Saucy Wenches be all up ons." It's not something a lot of players get all the time. It's not some more gems or some more GP. It's significant.
And thus, you can control directly how your game changes over time -- whenever you want, and not a moment before, you introduce a new Tier. Interestingly, you can also TAKE AWAY tiers, which is a fascinating gameplay dimension. Guess what happened when you failed to stop the orc invasion? They busted up your house. You're no longer a king. Now you know what it feels like to be a Roman, Jerkucles.
This also kind of helps beat the Quadratic Wizard vs. Linear Fighter into shape, too. The Wizard can create alternate dimensions -- when they are Epic Tier. And at that same time, the Fighter is Epic Tier too -- demigod, Hercules, Achilles-level stuff. Clearly capable of things a bit supernatural in nature.
Don't want a supernatural fighter? Okay, you can stop circa Hero or Champion tier. Your fighter still gains awesome powers, but he's not wrestling rivers. Simultaneously, the wizard isn't making demiplanes (though he's probably making the laws of physics dance around in a tutu for him on a regular basis).
The more I ponder this, the more it seems like this idea is a nice fix for the dillema.

Basically: The DM decides when and if such a change happens, by rewarding a tier-change as treasure.
What do you think?
Longwinded Diatribe
So, say everyone starts out in the "Zero" tier of the zero-to-hero-to-demigod continuum. You're a first-level street sweeper/rat slayer.
BUT WAIT! Your DM wants you to feel like a hero right out the gate, so he awards every character Heroic Tier right off the bat. That means that you come with increased reputation, increased capabilities, and better-than-average ability. You're no mere rat-slayer, now you've killed trolls! You're the best swordsman in town! Go you!
So you go on a few adventures -- maybe one, maybe 6,000. When the DM decides he's had enough of everyone being heroes, he thinks, "Well. Time to change things up," and after your next troll-murdering holiday, he awards you, say, Champion Tier.
Champion Tier comes with a keep. And followers. And land management. You're a fancy-arse lord now, and while you can still go off and slay trolls, you may have bigger concerns. Or not. Really depends on how tired you are of this or that.
After a few months of this, the DM decides to take it up a Notch, and make you Minecraft Tier. Wait.
Try that again: After a few months of this, the DM decides everyone has had enough of peasant revolts and pits the party against a great dragon. Amongst the dragon's items is a mystical artifact that can grant godhood. You've now been awarded Epic Tier. Awesome. You're the best thing this world has to offer. Orcs can no longer threaten your pies.
What This Means for Numbers
Basically, this is E6. With Speedbumps. You can spend 10 or 20 or 30 or 40 or whatever levels in the Zero Tier, without ever changing the way your game is played. At a certain point (circa level 5? level 10?) you stop gaining vertical increases (your Gettin' Stuff Done +5 doesn't become +Gettin' Stuff Done +6 at your next level, it stays +5), and you instead gain breadth (your Gettin' Stuff Done +5 is joined by, say, Also Chewin' Bubblegum +3).
When your DM is genenerous and makes you a hero or a lord or a god, you cross the speedbump. Now you gain vertical increases start racking up again -- you can increase your +5 all the way up to +10. Then, you hit another speedbump (plateu, mortal threshold, whateverthehell). You can't get to +11, though you can get a lot of different +10's.
What This Means For DMs
You control your game's feel. Simply by virtue of awarding XP, your game's style never has to change. If you want to start off the game higher-powered, maybe play as gods for a while, you don't need to start at level NINE THOUSAAAAAND, you can simply be level 1, and have the Epic Tier award. If Zero doesn't appeal to you, start at level 1, and have the Heroic Tier award.
You can stay within that feel forever, if you want. You control the precise point at which the game changes.
Because of that, you can also make BIG TIME awards. Give your players a Tier, and it will feel magifnificent. You don't scrimp and save for your keep on the borderlands, purchasing it by the GP, your DM hands it to you on a silver platter and says, "Congrats. You're a king. Saucy Wenches be all up ons." It's not something a lot of players get all the time. It's not some more gems or some more GP. It's significant.
And thus, you can control directly how your game changes over time -- whenever you want, and not a moment before, you introduce a new Tier. Interestingly, you can also TAKE AWAY tiers, which is a fascinating gameplay dimension. Guess what happened when you failed to stop the orc invasion? They busted up your house. You're no longer a king. Now you know what it feels like to be a Roman, Jerkucles.
This also kind of helps beat the Quadratic Wizard vs. Linear Fighter into shape, too. The Wizard can create alternate dimensions -- when they are Epic Tier. And at that same time, the Fighter is Epic Tier too -- demigod, Hercules, Achilles-level stuff. Clearly capable of things a bit supernatural in nature.
Don't want a supernatural fighter? Okay, you can stop circa Hero or Champion tier. Your fighter still gains awesome powers, but he's not wrestling rivers. Simultaneously, the wizard isn't making demiplanes (though he's probably making the laws of physics dance around in a tutu for him on a regular basis).
The more I ponder this, the more it seems like this idea is a nice fix for the dillema.