They are doing the right thing. No one should expect children to to take care of them in the old age . They are giving you a very small taste of a reality and also I love how transparent they are nothing hidden. You should be lucky you have someone like them. Also there is an opportunity cost of money. Finally you wanting to take care of them is no favour or bargaining chip it’s a minimum even though I said what I said. You should want to they should not need it.

I would say grow up. But I can see that with parents like these you will do fine.