Well, first, they certainly aren't paying any taxes unless he is making over 200k per year....
each kid while in school is costing the town (and other taxpayers) an average of $9k per year.. assuming, since they look young, they have at least 8 in school, that's $72,000 per year..... 17 kids x 12 (years in school) x $9,000 (cost per kid per year in school) = $1,836,000 dollars
If they even pay taxes on their house, if they own one, they probably pay less than $10k, so others are picking up $62,000 per year.
Of course, then you have free school lunches, maybe breakfasts... and the aforementioned food stamps, etc....
And, I'm betting one of those TV shows will build them a new house because theirs is so crowed... and people will send them money (seen that happen before), and they get interviewed on TV and may get a book deal and movie...
Maybe they will get a presidential medal when they hit 20...