I don't believe it. Anyone who's in a career position has probably been getting a raise the last couple years to combat inflation and retain during the great resignation. I'm sure plenty of people are worse off but 80%? No way
I'm better off, but not by much. I'm working from home now so that helps. I spend less on gas and work clothes (since I'm mostly dressy casual now instead of dress clothes/shoes). I'm also spending less on food because COVID forced me to get serious about meal planning. (Every trip to the store was a possible exposure so I had a big incentive to get everything I needed, and only what I needed, get out, and not return until next week.
That being said, I'm also facing prices that have risen about as fast as my salary - if not faster. I'm also getting to that age where retirement isn't some nebulous future concept. I'm likely going to want to retire in 25 years or so, but I'm not anywhere close to having enough money. Nor can I afford to put away what I should be putting away.
I'm living somewhat comfortably (if frugally) today, but one major medical issue or job loss and I'll be in serious financial difficult. And if things don't improve significantly for me soon, I'll be working until I die.