[amadeuspagel]

Not every single employee is necessary in the sense that the business would go bankrupt without them. (Even if that were actually true, the minimum would drive some businesses into bankruptcy, so I don't see how it would help your case.) Rather there's always a choice on the margin. The business can sweep the floor every day, every other day, twice a day, etc..

[RandoHolmes]

As a software developer, if I were asked to sweep the floors I'd probably find another company to work for.

Or maybe not depending on how much I cared about the company, but most likely I would.

So for these companies, it's required.