The way to fight employer abuse is the same as it's always been: forming a union.

As far as "still not hurt our bosses and companies in the process", you will do exactly that. That money they save by getting you to do the hours of 2 people isn't just laying on the ground. It's going somewhere. So if you want the company to pay you more or hire the amount of people they actually need to let everyone work more reasonable hours then they either have to raise their prices or cut costs somewhere.