Why are highly-skilled workers only getting $15 an hour is the better question. I did the math on actual survival once, using very conservative figures for a monthly mortgage, clothes, food, insurance, health insurance and transportation. This hypothetical person has no drug or drinking addictions, isn't a gambler, is chaste as your Aunt Betsy and even goes to church. He's just trying to get by. Just the very basline basics. I found that even at $20/hour a person would be nearly working themselves to death, after taxes (actual take home to make ends meet month to month) and just treading water. Forget about savings. Forget about vacations besides a trip to the County Lake. This person would still have to be receiving some kind of dole, some subsidy, some handout in order to "be a good citizen and consumer".
Then the corporations who pay these people such miserable wages, gnash their teeth at falling profits and sinking demand. Especially high-end products like expensive electronic gadgets, lavish vacations or any other ornamental industry that isn't part of the necessities of life. These people are coached by their buddies the rich and up and coming CEOs to hate people on the dole. But the dole is the only thing keeping their company running in the form of enabled-consuming.
The failure of this country's economy is quite simply the failure of our economists to sit down and do the elementary school level math of an average Joe's monthly income after taxes vs his outlay and what is left over at the end of the month. People at the top of any industry here are just flat-out too greedy. They want a string of six ponies for every child they have and all of those ponies have to be living in marble stalls with their own gold-plated troughs. There aren't enough super-rich in this country to justify a gold-plated trough factory, so they all have to be hand made in France, where socialized programs make it possible for artisan industries and new startups to thrive and survive.