I took a few business courses in college. Ideally everyone would have a job and be able to live the life they wanted to live, regardless of their cost of living. In reality, that's never taken place in our history.
The problem with raising minimum wage, to say $20 per hour, is that some businesses, mostly small, won't be able to hire as many employees as they could if the minimum wage were instead $10 per hour, due to financial constraints and limitations. This result is higher levels of unemployment IF all businesses, small and large, bear this financial crutch but not all of them do; McDonalds and Walmart bring in millions, if not billions, of dollars of profit every year and yet do hardly anything for those employees they hire.
Add in the fact that technology is replacing many old-school jobs (cashiering, bagging, security for examples) and you see why businesses are looking to cut back on the roster list.
I find it all very interesting nevertheless.