Please. The only people who say that are making cushy salaries. Head on over to a place like /r/povertyfinance and tell the people there with a straight face that "Wealth ≠ success"
While wealth (or rather, being "wealthy") is absolutely a success, it is not the only way to succeed nor is its definition "not being poor".
As such, I'd like to believe people at places like /r/povertyfinance would still consider themselves successful if they moved beyond their financial challenges through a ton of work even if they don't end up wealthy.