Indeed [1] "Computer security and information privacy expert Bruce Schneier compared MICT to the mass surveillance of the National Security Agency (NSA), revealed in June 2013 by Edward Snowden. Schneier said, "Basically, [the USPS is] doing the same thing as the [NSA] programs, collecting the information on the outside of your mail, the metadata, if you will, of names, addresses, return addresses and postmark locations, which gives the government a pretty good map of your contacts, even if they aren't reading the contents."
[1] https://en.wikipedia.org/wiki/Mail_Isolation_Control_and_Tra...