I I think the government should just remove themselves from marriage all together. That way it would give no tax benefits whether married or not and it would allow anyone of legal age to marry whomever they wanted to. But I would also make it to where no one can be forced to marry two people so those two people will have to find another party to Merry them. Basically anybody can marry anyone they want so long as I don’t infringe upon anyone else right to do it