The vast majority of Americans are not working 100 hours a week just trying to get enough for the basics (goodwill clothing, food, and a shelter...). They might be living paycheck to paycheck, but it is with 40-60 hour per week job, and the are living paycheck to paycheck because they spend money when they make it (this is a sensible thing to do with most of your money - though having some emergency and retirement savings is a good idea, for most people the risk of death before they get old is too high to make saving much more sensible.).

Which is to say the vast majority have plenty of time to think about politics. They don't but that is because they choose to do other things, not because they lack time. (even those who do take the time often only think about it superficially)