What does "should have the right" mean? Should current parents who invest heavily in prenatal (or other pre-competence) improvements to a child have this right?

I'm generally uncomfortable with the idea of long-term contracts that don't have fairly clear termination options. I think people and cultures change too much over a few decades to have any clue what's going to be right for them (let alone others) in the far future.

And if you do include the standard options (primarily bankruptcy), it's pretty easy to game: declare bankruptcy immediately, before you have any earnings.