I can't remember where, but I was reading about this several years ago. The story went into some detail about the looming societal unrest that is in large part due to the millions or perhaps even tens of millions of men who are underemployed and who don't have a family to care for precisely for the reason you cite.
Unemployed or under-employed young men with no family to lookout for, usually leads to societal corrosion, perhaps even revolution. Look at the lawless band of young men that have wrecked so much havoc on so many African countries the last 40 years.
This is like when they decided to exterminate all the birds in part of Peking — I forget the reason why — but the result was a massive invasion/proliferation of insects — the birds who used to eat them were no longer there.
So stupid when arrogant men try to manage nature.