"Could you explain why you mean by "fall flat"? Do you mean that the businesses that currently employ the service workers would close because they would be unable to find anyone to work for them? It seems likely that they'd need to increase the wages paid for unrewarding positions,"
No.
Coffee Shops etc. already run on pretty low margins -> they'd be out of business. Any business wherein labour is a significant input cost and where wages are low enough that people would quite - would shut down - and that's a lot of businesses.
"So more art gets created, the lifestyle is less materialic "
That's a choice we can make today - we don't need massive government intervention to make that decision for us.
It also means a significantly reduced output:
The value of the 'art' getting created is significantly lower than the 'service' they provide making coffee - or else that art would be getting created.
It's easy to prove: if their are were 'worth something' to you and I, we'd be buying it. We're not. But we will however hire them to make coffee for us.
"Would I be right to guess that you are not currently working a poorly paid job you hate in the service industry while trying to find time to pursue the art you love? I don't mean that last question as an actual attack, but I do wonder if your self-interest might be different than that of the majority of your neighbors."
I don't care what my neighbours 'aspirations' are.
It is not their right to take my money to pursue their aspirations.
If they want to make art that nobody wants to buy, that's fine by me, but I should not have to pay for their rent so they can do that.
They can serve coffee, get a better job, make better art that people want to buy - it's entirely their choice, they are entirely capable.
They can have whatever lifestyle they want to build for themselves.
If they are handicapped, or ill, that's another story, but otherwise, their life is their job, not mine.