There is nothing in our legal system that compels you to care about future generations -- at least not in the way you're proclaiming.
These childless workers are 100% entitled to their opinions about equitable compensation -- and they're entitled to lobby for these changes as well.
I was replying that we, as a society, DO care about the future of the species. We put laws in place to help further it's survival, mostly around supporting the currently existing children (tax breaks, education, etc), but also around helping people have more children (FMLA).
The reason those laws exist really isn't that different from the laws that support property rights; they support things we, as a society, value.
> As a society, we decide what things are important to us and everyone gets to help support those, like it or not.
If GP doesn't care about supporting parents or future generations (and he is in a position to make this decision), it's certainly his prerogative to not do so.