then you forget the economy of scale. if you want to pay the no skill worker a skilled worker wage then the skilled worker will want more money.
if he doesn't get more money then you have devalued his skills and his job position.
if he does get more money it means that prices will drive up even further and the people making minimum wage will still be at the bottom only worse off.
if anything you hire more people and just work them 15 20 hours a week and they are still making the same amount of money.