Mississippians average $43,000 of disposable income. Net federal money to Mississippi is roughly $9,000 per capita. Even if we assume that 100% of that $9,000 is welfare payments to the poorest, that still puts Mississippi roughly equal to Germany in terms of disposable income.
And still Mississipi has a child mortality rate og 9.65 infant deaths per 1,000 live births, compared to Germanys 3.4. Life expectancy is 72.6 vs 81.7 (!!)
Looking at income per person really misses some important factors of a societies real riches.
Mississippi has a very high obesity rate (enabled by our wealth and our fairly generous welfare programs, actually). Mississippi also has a far higher percentage of black residents than the median US state, and blacks generally have higher rates of obesity and lower life expectancy due to lifestyle choices, higher rates of participation in gang violence (which leads to a higher murder rate), and various other cultural and environmental factors.
A Mississippian is free to eat themselves to death (enabled by Americans' wealth) in a way that Europeans simply can't.
As mentioned before, your view that Europeans can't afford to eat the cheap shit that makes you fat, is just straight up absurd. Across western countries (including the USA) obesity is a poverty problem. It's often called the "poverty obesity paradox". There is no lack of information about it online if you care about knowing, and American obesity is not the flex you seem to think it is.
White people in Mississipi had a infant mortality rate close to the national average at 5.8. Which still means it's 50% more likely that a birth result in the infants death the the USA than in Europe. The fact that black people in Mississipi has a infant mortality rate of 16 should really shock you, and indicates that something is seriously wrong somewhere.