You would only get benefits if you were genuine (although how to determine that I don't know).
I'd also change the system to that similar to Tenerife. Unless you have contributed financially to the system you get nothing.
There would be no financial benefit whatsoever in having kids. This would encourage people to have kids because they genuinely want them and can afford a family not because they want more handouts. Controversial I know but my opinion which I'm entitled to.
I think these points would make a huge saving.