Well in my country there are tax privileges for married couples. The goal of those privileges is to increase the amount of children in the country.
Same sex marriages are now officially recognised by the state, but do not get any tax privileges.
You see, I’m on board with that logic right up until there are childless hetero couples. I think if a gay couple plans to adopt they should get the exact same privileges.
Or maybe a marriage only gets the tax break if they prove they are raising a child. Otherwise straight childless marriages still benefit from the tax break while childless gay marriages do not. If more kids are the goal, make kids the deciding factor for the tax break.
This is then hard on the hetero couples who want a child but can’t make one. But then again I suppose they have the adoption route open to them also.