Bistiza is 100% right on this one. A few philosophers started predicting in the 1600s and early 1700s that a true Republic would never work because everyone would want the government to do more for them for less tax money, and they weren't wrong...
It is 100% true that the poor think that the government should increase programs that help support them, and that they shouldn't have to pay taxes.
It is 100% true that the wealthy think they shouldn't have to pay taxes to a government that subsidizes the poor as much as it does now.
It is 100% true that the middle class want more government assistance, could generally name a number of Federal programs such as road maintenance and National Park conservation and Federal Contributions into Social Security they would like to see bolstered AND to pay less taxes.
Obviously none of those things are entirely universal. Some wealthy people are happy to pay taxes and support the poorer elements of society, although even those might prefer to do it through charitable donations rather than taxation and inefficient government-administered programs. Some poor people aren't looking for handouts. But if you polled social classes, these general trends would be extremely pronounced. Everybody wants some combination of getting more from the government while giving it less. This is the inherent problem with a democratic system. People always want more from the government than they put into it, and when the government needs to be responsive to the people in order for individual members to keep their jobs the government as a whole tends to be more responsive to sometimes irresponsible or uneducated public demands. That's when we run massive deficits. Say what you want about totalitarian governments (and I'm not suggesting we get one), if they want to raise taxes they damn well do it. If some poor people starve that's just an unfortunate side effect.
Frankly, strict term limits on all elected positions could help tremendously with managing the debt in the long term. But then it means you have constant "feeling-out" periods where new officials don't really know what they need to be doing, and it's possible less gets done in general. It's just a matter of picking the lesser of two evils, and that really isn't abundantly clear to me.