> In theory, a place could be so great to work at that people would pay to be there. That would be negative pot sweetening with money.

Then it's no longer a job, it's an expensive hobby / education / retirement activity.

Most people work jobs to support themselves (or others) financially, you can't do that on negative income.

And having more income than you need means you can retire sooner and do more of your desired hobby then, so it absolutely is a pot sweetener.