That contract would be made for the sole purpose of you making medical decisions for her? I think that existing power of attorney laws should be strengthened to cover that. If it were only about end of life decisions, that would be one thing. But marriage covers a whole gamut of other contracts that might be theoretically possible to obtain, for quite a bit more money than one marriage license fee.

Marriages historically have to be consummated to be considered valid. Think about medieval European history. If a marriage wasn't consummated, it could fairly easily be set aside.