The study examined 99 U.S. cities based on the “50/30/20” budget – 50% of your salary for your needs (housing, groceries, transportation, etc.), 30% toward entertainment, hobbies, and 20% toward paying off debt, savings, and investing.
Thirty percent of income for entertainment and hobbies seems high for lower income families and individuals. Also my guess is a lot of lower income people aren’t saving and investing anywhere near 20%.