I'd happily work for 20 hours @200k a year. It'd give me time to work on my own projects.

Issue is that virtually no company offers that deal unless you already have noteriety or money at the level of retiring anyway.

Most companies won't hire people with a high degree of notoriety. They may hire those people if they have some degree of fame.

I've met plenty of people that do this. They are contractors, they take on a contract, work for 6 months, take the next 6 off. I also know some tax accountants that do this.