Source authentication is basically an unsolved problem. There are some cryptographic approaches to doing it, but they all basically boil down to moving trust around between different parties. The problem certainly isn’t a lack of government set open standards.

The problem described above also doesn’t exist. A signature isn’t a necessary element of a contract, and even in situations where a signature is statutorily required for a certain type of contract, an e-signature is legally recognised (in all US states at least) without specifying that particular service providers or methodologies have to be used.