They are living at home because they can’t get a good job.
They can’t get a good job because we lowered the import tariffs and let too many jobs and industries go overseas.
They aren’t marrying because they can’t afford to take care of themselves much less someone else or raise kids.
And the immigrants we let in are part of the problem. They are taking the jobs that are still here from Americans.
Close the border, and restore the tariffs. Use the tariff revenue to cut taxes. More Americans will be working and keeping more of their income and spending their income into the American economy. Win win win win win win win.
Also aren’t marrying because they can get laid from a ‘liberated’ woman after a week on Tinder and for $30 worth of dinner/candy/etc. instead of spending a year courting and having to pass parental approval.
Combine that with a insane family court/divorce system and you literally have made it not just economically nonsense but a gamble on financial suicide. Hence, less weddings!