Basically it's a matter of natural selection. Given a starting population of EMs, if some are unwilling to be copied, the ones that are willing to be copied will dominate the population in short order. If EMs are useful for work, eg valuable, then the more valuable ones will be copied more often. At that point, EMs that are willing to be copied and do slave labor effectively for no complaints will become the most copied, and the population of ems will end up being composed largely of copies of the person/people who are 1) ok with being copied, 2) ok with being modified to work more effectively.
What question are you answering?
r/Fitness does a weekly "Moronic Monday", a judgment-free thread where people can ask questions that they would ordinarily feel embarrassed for not knowing the answer to. I thought this seemed like a useful thing to have here - after all, the concepts discussed on LessWrong are probably at least a little harder to grasp than those of weightlifting. Plus, I have a few stupid questions of my own, so it doesn't seem unreasonable that other people might as well.