Let the market operate. In a shortage of girls, girls fathers can say "No dowry. You want a wife for your son or not?". In a serious shortage, the GROOM pays a dowry.
I think that whole culture has gotten so screwed up as East meets West; the few Hindu Indians I know are horrified by the very thought of children. Once they come here a lot of tradition is tossed out the window. The Boys Club in my town closed years ago, and is now a Hindu temple (they are one prong of the Asian/Hispanic invasion of the US; my town has far more Hispanics). An Indian friend eventually compromised with his wife; he wouldn’t engage in forbidden things (smoking, drinking, eating meat - particularly beef) in their apartment.