You seem to be implying that cash/capitalism is the only incentive. People are still becoming teachers, aid workers, and pursuing the arts even though the financial incentives are terrible. All of those fields aren't all fun and can be risky endeavors.
Let's say we have a basic income. There will probably be less maids so people will have to spend more of their own time cleaning. Your office might have less janitors, part of your job might be to empty trash outside. Maids and janitors will still be around. Their roles would be diminished and they'll just get paid more.
We don't have a purely capitalistic model right now. Whatever we move toward won't be a "pure" anything, either.
The personal incentive is that we could all live better lives. We have the means and the capability to directly improve quality of life, rather than gaining capital to trade it for quality of life.
Let's say we have a basic income. There will probably be less maids so people will have to spend more of their own time cleaning. Your office might have less janitors, part of your job might be to empty trash outside. Maids and janitors will still be around. Their roles would be diminished and they'll just get paid more.
We don't have a purely capitalistic model right now. Whatever we move toward won't be a "pure" anything, either.