Even if you are childfree and wealthy it isn't a given that you should help them out if you got on with them
I am, or was until I adopted my two. You would be surprised at how people seem to treat childFree people as some kind of walking magic money tree.
My family have been great, but my husbands sister (mother of the two we adopted) certainly expected us to pay for clothes, education, toys, tech....you name it, just because we didn't have children of our own. We were also expected to babysit at the drop of a hat, pick them up from school when ill even though we worked full time and she didn't work at all. All we heard was that we had no responsibilities, no one to spend our money on except ourselves, the usual bollocks. We did it because we love the kids and they were definitely being neglected, hence why they came to live with us when she died.
I've also had friends who have asked me to be godmother to their children so I'd help out financially with the kids, but expensive presents etc. Usual story: what else did I have to spend my money on? Err, you'd be surprised.
I've also had an elderly aunt who I used to look after a lot leave all her money to my brother and sister and cut me out of the will because I didn't have children to raise and they did.
There's so much entitlement that people like me suffer just because we decided not to have, or couldn't have, kids.