@Gala,
If people can do the same job, at the same level of skill, for that wage, then yes, I agree.
If there were the case, we could afford to expand mass transit to areas where right now it is way too expensive. More and more people would be able to afford to ride MT. Fewer and fewer cars would be on the road. Taxes could be lowered or tax money could be re-allocated to better uses. Think of all the possibilities.
Mass transit serves those most in need, those in poverty and the elderly; if costs were reduced there could be more help provided to these groups.