So parents have a duty to care for their children, but also everyone else has a responsibility to take care of them too. Okay. Let's say that you have a child and, for whatever reason, you feel that you aren't receiving enough welfare to take care of them (let's just ignore the implicit assumption that you deserve any amount of welfare you feel entitled to). Are you justified in murdering the child to relieve yourself of the financial burden since not enough random strangers were willing to give you money?