Ah eugenics it has worked so well in the past.
The safety net has often now become just a net, it is true but such ludicrous concepts as forced or near forced sterilization is of no aid to the cause of making a better America.
To extend the nightmare of unintended consequences your suggestion would create, lets posit the requirement for ALL people at say age 14 to have long term internal birth control implanted and only when the have proven to be able to with out assistance of the people to have and raise children could it be legally removed. That is the road down which your post may lead.
I agree that encouraging people to have children when they can provide for them is good policy, but doing so with a carrot is far better than with a stick
My plan would force no person to be sterilized. Only if they asked for gov. aid. Why should my and your tax dollars keep on supporting people who use welfare as a lifestyle and pop out kids like a pez dispenser. All these welfare mothers do is create more uneducated, violent morons who drain billions of tax dollars and cause mountainous levels of crime. Something has to be done.