In my mind because Biden/Buttigieg had Congress impose a labor contract to prevent a strike a few months ago and rail safety due to labor cuts by these same rail companies was one of the issues workers were concerned about?
Of course it is feasible, but the transit corps are only interested in maximizing profit and the government backs them up. They could run these trains with 10x the crew, with full top-tier benefits, and still turn a sustainable profit. But right now these companies are being run as paperclip maximizers and merely sustainable profit isn't good enough for them.