Where I live I'm in the people I see an online dating, they're not on welfare. They're either independently wealthy, which is possible, but more likely they have a long-term alimony set up, as well as the father paying hefty child support.

If Dad was making, say $200k, Mom stayed at home - and they were married a long time - in most states the wife is going to have a very large alimony, possibly for the rest of her life, as well as a sizable sum child support - not to mention they may have started their relationship together when they both really had nothing, so they split half of the house, the retirement accounts, savings, everything, they're all marital assets.