> First, clearly such people don't donate to families, making that a pointless argument, and second, even if they gave new parents money directly

Yes. That is my point. Theft is required to execute this policy, which defines the deadweight loss.

I argue that companies may offer better leave benefits in order to attract workers. My company provides six weeks for primary and two for secondary caretakers.

Amazon gives a month or something like that. Clearly I would have incentive to work there if I could, and by that I mean others better skilled than me fill those vacancies. The policy is effective.