Some jobs are viable at $8 /hr but not $15 /hr so the business have to eliminate positions to stay solvent. That means someone who could have taken the lower pa

Some jobs are viable at $8 /hr but not $15 /hr so the business have to eliminate positions to stay solvent. That means someone who could have taken the lower paying job now has no job at all. Also, inflation. When everyone is making at least $15 /hr then that $15 means less than it used to. All costs of goods go up to match the new supply of "wealth". Burger flippers make $15 /hr but burgers now cost $10. In more meta terms: manipulating the market is never easy if it's possible to do successfully at all.