So, lets assume for a moment that we are considering a world wherein the PCs are not exceptionally wealth until at least pretty high level, normally. Where PCs can't really break the economy simply by spending gold. (ignoring spells that could break the economy, for this thread)
What would be have to inflate the wages and prices in the core books to in order to get this sort of world, assuming either of these two;
1) Loot as per the DMG tables
2) Half as much loot as the DMG tables
I was going to say alot, but rethinking it, this question highly depends on the type and pacing of the campaign initially.
In a game paced where the time difference between tier 1 and tier 2 adventure is roughly 6 months or a whole year, the PCs can expect 7 rolls of the table for the start of this downtime. Or roughly 1,372gp worth of gold (7 rolls of the table: 2100*7/100 + 1050*7/10 + 70*7) with a certain amount of gems and art pieces. I'll raise the expected amount to a healthy 2,000gp.
Split amongst the 4 players, that's about 500gp to share for downtime, not counting extraneous expenses of gold. With this amount at this timespan, the players will be living either comfortable or wealthy lifestyles. Decent, but not economy breaking. Characters wishing to practice a profession will be able to hold onto this money but characters looking to train, recuperate, research, craft magic items, run a business, sell magic items, or sow rumors have to pay their gold and sometimes more.
Characters wishing to craft mundane items can basically do so for free but they do need to have half the gold worth of resources of what they're crafting. A spear in the woods may be free but plate armor in a city might require you paying anyways.
Now, if you pace for like a week between tier 1 to 2 as downtime, they'll be very wealthy comparatively and also get very strong very quickly.
So again, it depends on the campaign first and foremost.