I think you’re really underestimating how many 25-35 year olds work for large corps. And you’ve got it reversed. The big corp jobs are the only ones paying wll enough to escape that treadmill. Sucks, I would love to work for some local mom and pop, but FAANG can double or triple the salaries of what they can offer. Most of my peers that I have talked to are in a similar boat.
And again, we all get retirement accounts in the first couple of weeks of employment. That’s been the case since I worked at comparitively much smaller companies even.