It all comes down to the immediate bottom line. Training is an expense these days where it used to be an investment in the future. Trades schools and colleges used to provide the basics of skills that you honed on the job, union shop or not as your skills and abilities improved so to did your compensation and/or other incentives that recognized your value to the company. Today a everybody can be replaced mentality holds sway thus a self fulfilling downgrading of employee value thus employees show no loyalty to an employee which just continues the downgrading of US industries… then they start crying to government looking for corporate welfare/socialism.
Into the 1970's a family with a single wage earner at minimum wage at 40 hours per week could live a decent life, own their home and maybe a used car. Can you do that today? Oh but it’s a different world today… your chickens have come home to roost, they no longer lay eggs and even chlorine treatment won’t improve their tough meat.