Here are the numbers for context:
https://dqydj.com/household-income-percentiles/
The median household income doesn’t earn the median wage every year from when they started working. That’s just a snapshot and it’s highly correlated with age. I’m 51, I damn sure couldn’t afford to max out my 401K. That means I was 25 in 1999. I definitely could afford to max out my 401K - which was then $10K a year - when I was making $35K a year.
Especially when new grads are coming out now with student loan debt.