I think it's a combination of several factors:
1. Wage slavery -- a de-facto state of slavery suffered by many, whereby people work and work and barely own anything or get ahead. The banks charging usury is largely responsible for this, but taxes are another part of the problem.
2. Increase in materialism and lust for pleasure (buying nice stuff, vacations, travel, body shape, convenience, and other carnal pleasure)
3. Increase in selfishness.
4. Loss of knowledge of how to live frugally, with common sense, and cheaply.
5. Loss of the art of raising and DISCIPLINING kids, so that kids become a huge burden these days.
6. TV pushing items 1-5, and also making kids into selfish gluttons as well.