But this is an hour cap. The employer is saying, don't work more than 20 hours, or I'll lower your rate. It's better than a strict cap, since it does offer peop

But this is an hour cap. The employer is saying, don't work more than 20 hours, or I'll lower your rate. It's better than a strict cap, since it does offer people to work more if they want. It would only be unfair if the employer would then instruct workers to work overtime; I assume that could be illegal (depending on where in the world this happens). But voluntary overtime is very different.