The NSA, the original primary developer of SELinux, released the first version to the open source development community under the GNU GPL on December 22, 2000.[6] The software was merged into the mainline Linux kernel 2.6.0-test3, released on 8 August 2003. Other significant contributors include Red Hat, Network Associates, Secure Computing Corporation, Tresys Technology, and Trusted Computer Solutions.
Honestly I think it ultimately comes down to the size of the organization. Chances are the right hand doesn’t know what the left hand is doing.
I do like the direction the US is heading it. Some top brass have finally caught on that you can’t limit access to back doors.