The government has a legitimate role in controlling personal behavior only to the extent that such behavior directly harms other persons. It has a legitimate role in prosecuting theft and assault and rape. It does not have a legitimate role in telling people who they may enter into consensual relationships with, and it most certainly does not have a legitimate role in redistributing wealth to disproportionately benefit those citizens whose personal relationships meet with the government's approval.
In your opinion then, the government may not outlaw polygamy, polyandry, consensual incest, necrophilia, beastiality? Killing animals in the privacy of your home OK (no people are harmed)? Can the government regulate contracts? Adjudicate disputes between parents and children? Blood Relatives? Confiscate personal property with just compensation?
Your concept of government is juvenile. The decision of what areas of personal life the government should regulate is THE most important reason for having State Assemblies and Congress.