Here's another fun fact for you.
Construction labourers (ie, unskilled, no training, shovel monkeys) make ~$16/hr (depending on demand and geography etc etc), while a carpenter apprentice (skilled, trade school educated) makes ~$14/hr.
Sometimes you make less doing skilled work because of the upside of career advancement. The labourers will be doing labour at $16/hr + inflation forever. The apprentice will become a journeyman after a few years, and can then move up to foreman ($70k), superintendent($100k), and maybe even project manager ($150k+).
You can also look around to other countries. Minimum wage in many places in Canada is $10/hr. In Australia it's over $16/hr (with discounts for age, disability, geography etc). Raising the minimum wage doesn't blow up the economy and turn the country upside down.
All jobs have career advancement though, (to a point depending on degree)
My mother who never had any college started off minimum wage at a grocery store. Even after giving birth to me. She became surpervisor, then eventually manager. And moved on to be a loan officer in a bank making a good chunk.
So the problem once again goes to people, instead of looking at just upwards advancement, look for diagonal/upwards in another job advancement. Job experience goes a long way. People need to look for opportunities, not just sit at a minimum wage job for years thinking that 1 has to come their way in the same line of work. (this is true for college degrees too. Changing jobs after experience grants usually better salaries and benefits and even bigger titles than just staying where one is at.)
Schooling only matters for the first job outside college. After that employers look much more closely at job experience, loyalty and what achievements you have done in your work performance. Same thing every employee is valuated on.
(Not true for everyone) But people I have met between 29-40 that have been working at a minimum wage job such as at a factory or even fast food, do not have the desire to work harder or try harder for chances at moving higher. They just want more, for the same amount of effort. We need to remember rewarding extra effort helps a chain in which more effort is given and so on. Rewarding for no extra effort, means people can never give more effort and expect more and more rewards. It is a psychological part of the mind that is being shown in kids these days hence the word "entitlement" has been thrown around.