I am not entirely sure that I get what you mean. It sounds like you mean the entire world will standardize on one thing - extemporaneous haiku, and that no other skills would matter. If that's what you mean, I am pretty sure that's entirely not the case.
There are two things that we'd probably fall to - things that are useful and things that are entertaining. Be really good at what you do in either of those very broad categories, and you'd be "wealthy" in reputataion. So, a great chef would have high reputation. A great engineer would have it. So would a great songwriter.
Now, imagine a world where all of those skills are done more competently by a robot.
A robot can make better tasting food (like, literally -- let them look at a human making food or the result, and they make stuff that looks better and tastes better in any kind of "blind" taste test). Similar for engineering and writing songs.
They can even be a personal assistant better -- find things for you to enjoy, organize your life, etc.
Different robots also provides better police services, better accounting oversight, wins at go and chess, can do ballet, etc.
Like literally the only thing that people do better is be meat bags of mostly water.
What more, those robots cost less to build and run than it does to feed a human, in terms of using crop land to grow either human food or energy feedstock for machines.
Now imagine you are a group of people who controls 75% of the wealth (resource rights) of a nation. You own literally three quarters of the assets, land, etc. What more, your economic system lets you spend those resources on buying out more rights. Do you want to use your resources providing for humans who don't do anything useful for you, or do you want to use them for your own (and your family's) enjoyment?
I mean, a crystal palace on top of a snow covered mountain in Florida isn't going to build itself.
And your friend has a taller ice palace. But, if you arrange the terms just right, you can claim the assets of another 5% of the nation in a mere 10 years through some sneaky contract work.
Sure there are homeless, but is it your responsibility to care for people who lost their social security number?
When the mass of people democratically seem to be about to decide to take your resources away, will you sit back, or are the police forces robots just rented from your firms already?