More to the point, the purpose of the encrypting system nobody uses is to have something to use if anybody ever makes the computer that doesn't exist. Now if that happens, what?
We really need to get people to take really complicated risks that might never come to pass much more seriously. Perhaps someone smart can explain the really complicated risks that might never come to pass to the government that doesn't really look beyond the three year time horizon and get them to allocate some of their money that doesn't really exist to help.