I am guessing you don't have any friends who are single mothers.
I have been a single mother since my kids were toddlers ( which is why I opened up my own dayhome). I work 60 hours a week between my day home and another part time job to support my kids. I receive child support from my ex who makes over $100,000/yr and I assure you I am in no danger of being " rich". I also have had several single mothers who use/used my day home services, and like me, work very hard to earn an income to support our kids.