Dave's principles are easy to apply for anyone, no matter their income. Even if you only make $24,000 a year, you can do this. The principles are simple: Live on less than you make, shed debt, don't borrow, invest wisely. The pervasive "gotta-have-it-now" conspicuous consumption mindset is addressed, in a no-nonsense style that still manages to convey warmth and caring.
He recommends extra jobs to increase income if the existing income is low. For those that view this as anti-family, consider two things: 1) Dave doesn't recommend it for the long term, only as long as is needed to get out of debt; and 2) financial freedom is a wonderful gift for your family. "Changing your family tree" is the aim. If you get out of debt, and teach your children the same principles of not spending money you don't have (i.e. borrowing), then you've changed your family for generations to come.
I did it; I got out of debt on a single-mom lower-than-national-average salary using Dave's principles. I dug out of a $24,000 pile of debt in sixteen months with this system. I am now debt-free, saving for retirement, setting aside some money for my son's education, and more financially secure than I have ever been. The plan works, if you work it. The key is personal responsibility.
Sure, Dave makes hundreds of thousands of dollars a year - now. He didn't always, and the fact that he lived what he preaches makes this book credible, interesting, and relevant.