In the US, you need to make good money because everything is out of pocket. If you don't, your quality is life is poor. This is also why whenever Americans compare their life to Europe, it's always numbers based. It's all we know: big numbers, better life.
Not to mention things that are not easily qualified by pure numbers, such as work culture, vacation time, public transit.
Europe has vastly more progressive and people friendly political, economic system and cultural setup. This is speaking as an American in tech with a relatively high income.