Nobody wants to incur in greater costs than necessary. The good thing is, by only using the people who are strictly necessary to get a job done, we free resources to be optimally allocated. When the US became independent it needed about 70% of the population working in the fields just to feed itslef. Now it only needs about 5%, and curiously the other 65% did not become unemployed - rather they found far more productive activities.
Sure, absolutely. I just get a little itchy whenever efficiency and productivity are cited as goals or positive outcomes in and of themselves. To me, those are means to an end. and unfortunately, we Americans have a history of forgetting that people are the point here (it is after all baked right into one of the words we Americans like to throw around willy-nilly - "democracy"). There have literally been bloody fights in the streets over civil rights and workers' rights and immigrants' rights. Heck, we even fought a full-blown war once. I don't expect
that to happen again, but only because we work to keep it from happening. If we get careless or take things for granted, anything's possible.
Anyway, minimum wage: I think a valid question to ask ourselves is, "Should it be possible for a person who works a full-time job to be unable to meet their basic needs?" It certainly isn't the only question to ask ourselves, and it raises further questions, such as "What
are basic needs, anyway?" But to me, the answer to that preliminary question is, "If it's worth employing someone to do something, then that person should be paid enough to eat, house themselves, and get education and medical care." It may be that any job that genuinely can't provide a person those things should just be eliminated from our society.
Part of the problem is in how many things are tied to a person's income. Military protection isn't. Fire response and emergency services aren't (although some people think they should be - remember the "let him die" moment when Wolf Blitzer asked Ron Paul about health insurance?). Some of us like to believe that criminal justice and law enforcement protection isn't tied to your income, but I think that's been exposed as a lie by now (the federal government is now filing a lawsuit against the City of Ferguson in their efforts to get them to shape the f up).
So individual employers are expected to provide their employees with a whole lot. Too much, really. For instance, we have this stupid system of tying health care to our employment that I think no other country in the world has. It's kind of an accident of history; I don't think anybody really meant for it to work out this way, but here we are. I know that small businesses and non-profits like colleges and, ironically, hospitals are massively burdened by having to provide their employees with health insurance. Clearing up that boondoggle would probably help clear up the minimum wage debate a great deal, but of course it's a real doozy.