If a society is to function people need to be doing the work that isn't enjoyable as well as the work that's enjoyable.
There's likely not enough people that get genuine enjoyment out of being a garbage man or sewer maintenance worker for a world with everyone doing what they want to work.
You have to add incentives for the less desirable labour or else the system collapses under its own weight.
The USSR gave early retirement to those that worked undesirable jobs, pretty decent incentive. Having undesirable jobs doesn't make Communism collapse.
