Should they be able to outright say: You can only have 2 kids? No. But I'm 100% for benefits being limited to 2 children for people depending on the government.
I'm sick and tired of my tax money going to irresponsible dickheads who know damned well they can't afford to raise a kid, yet decide to continue having them.
Regardless, in the realm of things, it isn't this that is leading to money issues for the US government. Do things like this add up? Yes, but there are much more massive things that have a lot more money being wasted that I would rather they fix before doing anything about this.
Money can't buy happiness. Just video games, which make me happy.