I once saw a janitor who always had more work to do. She worked 40 hours a week and then did the extra that the boss asked her about on any given day. She could've told him that cleaning desks wasn't in the contract. Or she could've reported the overtime. But not everyone has those kinds of luxuries if they want to keep their jobs.
Some jobs always have more shit to shovel, be it actual shit or feature creep. And some people will always expect you to shovel more next quarter/year.
I think the point is that people should have the luxury to only work 40 hours, and/or properly report overtime and keep their jobs.
Over here if an employer forced one employee to work more than 38 hours a single week, they could be fined up to $6,600. Firing a worker for not working more than that would be unfair dismissal and attract more fines, prosecution etc...
There are provisions for reasonable overtime, but cleaning desks wouldn't fall into that unless it was some kind of emergency... And the employee can work overtime if they want (and are paid for it or get time-in-leiu) but they can't be expected to.
They can get this luxury, if they unionize. But Americans won't tolerate any such thing, nor will they strive for it. The culture in America is all about slaving away as much as you can, either out of fear of losing your job or desire to be promoted up the ranks (with the reward of even more work). They make very few demands of their employers because they are told by our society that they should just be happy they have a job.
The best ways to gain leverage over employers that I can think of, short of unionizing or passing broad regulation: free basic healthcare coverage provided by the government to all, and a strong economy. An ability to leave your job without fear that if you get sick you will die/bankrupt will do wonders. An ability to leave your job because the demand for labor outstrips supply will make employers compete by offering better perks, compensation, benefits, work environments, etc (already the case in high tech).
Some jobs always have more shit to shovel, be it actual shit or feature creep. And some people will always expect you to shovel more next quarter/year.