[lotsofpulp]

> but the USPS has entrenched practices and infrastructure that might not easily extend to physical and digital security required to handle high volume finances at all.

The USPS has handled identify verification for the federal government since many, many, many decades. If you want a US passport, you have to go to a USPS office to get your identity verified. This is the logistically difficult part, since it involves so much labor, but it’s already done!

As for electronic accounts, the hardest and most laborious part is identity verification. The electronic accounts part can be taken care of by some IT department, just like visa/Mastercard/any number of banks and financial institutions (including the federal reserve) do.