I think progressives never thought about this because we banked on immigration and demographic change allowing us to win culturally and electorally but the issue is immigrants tend to be overwhelmingly male, that is how Trump won actually he won over a lot of Hispanic,Black,Asian and indigenous men who feel humiliated by a new culture, economy and world.
So what can we do rhetorically and policy wise to win more young men over ?
What research? There are lots of folks with crippling debts. I know tons of people who will never be rid of their’s. As an engineer, I have never known job security. Who wamts to worry about losing their job every day? But I notice plenty of guys making a lot more than me since trades have a serious shortage of workers. Electricians around here charge whatever they want because there is not enough of them. Hospitals around here are bought up by one entity, so nurses can’t quit and make more money elsewhere. Teachers are quitting in droves such that it’s become a national crisis. But then there are plumbers making 6 figures.