Maybe when we're talking about the bottom 10% or 20% I'll care less but having lived in that situation where even one major would have wiped us out I think it's a pretty serious problem that's often overlooked or blamed away.
I'm doing fine now(yay getting out of gamedev) but I'm always shocked how few of my coworkers are aware that most people are just scraping by.
Oh look, a news story about people with full-time jobs having to sleep in cars.
1. Go back in time and don't go to college
2. Get roommates
3. Don't have internet. Ration electricity.
4. Sell your car and steal a bike.
5. Don't eat.
and finally, move to Montana where your dollar goes further. This all seems to be relatively in the ballpark of what's commonly suggested when people on here rightly complain about CoL.
You might equally say that owning a Rolex increases your income, since it seems most people who have one make a lot of money.