You see, the reason why the poor go for the "the more the better" thinking is due to lack of education on family planning and the right knowledge of it. They only believe in having more so they could scatter them around with them learning skills and at a certain age, the kids start bringing in money for them when they ought to be living their lives first.
The rich ones have more knowledge about family planning because they know lots of what is going on. This is why lack of education kills.