One company did exactlly that: everybody must be in the office in 3 weeks, 25% quit, no layoffs needed.
I wish the US had stronger labor laws. :(
At any time:
the company is free to simply make do with one fewer person
and
the employee is free to simply make do without affordable health/dental/vision insurance, a pay check, a retirement account, and other such niceties.
Great deal. Very balanced and fair.