Just think all income from W2, 1099, dividends, etc. How much of that total income ended up either in an investment or savings account of some kind--or (as some have wondered before) was used to paid off debt.
A lot of talking head advisers counsel clients to save 10-15%, which I have always found to be laughable because in the next breath they will tell you that in order to retire you need $5M. Do that math, lol.
Per studies, the average American averages about an 8% savings rate.