You missed the point on marriage. The point was that marriage, as far as the government was concerned, was performed by local governments. The federal had absolutely no legal authority to override the local government.
And in actuality the government, federal, state, county or city, should have never been involved in marriage to begin with. It is a religious ceremony. It is a contract that was created by God between Him, a man and a woman. Mankind does not have the right to alter the terms of that contract.
I've never heard Rand talk about marriage but I believe he probably thinks about the same. Marriage should not be regulated or controlled by any government. The government should not be performing religious ceremonies.
If it the tax laws that concern you then dump them. Dump all tax laws. Our Progressive taxation scheme was forced on us in 1913 and it is not what this nation was founded on. The 16th amendment should be repealed but even so the Supreme Court said it does not justify the income tax. Amendments to the Constitution should only be about protecting and preserving our freedoms and not taking them away. They should have never been written to give the government more power. The 16th takes freedom away and empowers the government.
I know you want an authoritarian government that controls every facet of your life but that is NOT for me. I choose free will.