When you set a minimum wage- or engage in any kind of price fixing- you distort the market and historically that has always hurt the poorest people the most.
Looked at another way, minimum wage is the wage below which you will be unemployed rather than allowed to work.
A minimum wage is a penalty that keeps workers unemployed if they don't have sufficient marketable skills to overcome it.
Imagine if the minimum wage was $100 an hour. How many of us would be unemployed?
People seem to imagine that there's just a lot of money out there and the only reason that anyone might not have enough is that people are being greedy. This is zero sum theory, and it is not true in economics. It's nice to imagine that you're "foreign the rich people to give up the money they are hoarding"... but you're hitting businesses that are on the margins. What's the average margin for a business? IT's not the %50 that intel enjoys-- a grocery store maybe makes %3.
What do you think a business that is clearing %3 net is going to do when you increase labor costs by %50? (in this example.)
Edit: You can disagree with my position, or even find an error in my argument, but I'm tired of spending time explaining things and giving examples like this only to be downvoted for ideological reasons... constantly. Is a circle jerk what you really want HN to be? I don't think any rational person can say that my comment wasn't a quality explanation for the position.