Cause they use all their money for lyposuction implants :/.
BTW, you saying "You never see a regular girl or poor gal as hot as daddy's little princess," just proves you haven't been to much places. For example, my home town. The girls in neighborhood (including me) spend their time surfing and swimming and sports. We are all poor girls, yet at school, there are the poor girls, and the rich girls (that do lypo and implants), yet the one the boys go for are the poor ones.
Hope I helped!!!