How does your welfare system work anyway?
I read an article in the newspaper the other day that having 2 kids at home is 3 times as expensive as having 1. In Sweden, if you get, say, $150 per month for one kid, you'd get $310 for 2, $460 for 3, and since having 2 kids is 3x as expensive as having 1, I don't see how any family could actually produce enough kids to be able to avoid working and still get enough money to feed everyone, pay rent, electricity, water etc.
I mean, with 10 kids in Sweden, you get, with today's value of the dollar, about $1594 per month. That's way less then 1 person usually make per month on a normal 9 to 5 job.
The first kid usually cost, on average, $120,000 until the day it turns 18. Having one kid usually pays you 32400 during those same 18 years. So you'd be heavily in the red after 18 years with 10 kids.
Really, I don't see how anyone could survive living on welfare costs alone.