Cryptography lends itself to criminal activity and subversive warfare. It's hard to rehearse attacks because you have to do it on real live systems. Launch attacks, both on our systems and on others. Take note that attacks on private systems are the most worrisome. There is a manifest mistrust between government and private sector business.
Private parties are unlikely to accept help from government.
The likelihood of government systems being adopted is slim. Banks, for example, make high security expenditures and the choice of system is best left up to them. There are, however, market failures in the private sector. No one in the private sector bothers to protect against a simultaneous attack on power and telephone service. Reporting of incidents.