I don’t think rejecting Christmas gifts is on par with telling your parents not to enjoy themselves because you want their money when they die.

I’m going to spend my money and wealth as I see fit. I will not raise my children to bank on me dying before they turn 60 (realistically they’re gonna have to deal with me for a long time) so they can inherit some sum of cash.

For context, I never expected any inheritance from either parent when they died. Neither did I get anything except for a pair of gloves.