The US Government is not interested in hiring outside of law enforcement so they won't be able to find people to fill positions outside of law enforcement.
https://en.wikipedia.org/wiki/Government_employees_in_the_Un...
ATC should probably be private like it is in Canada, where it functions very well, and also better lines up with how the federal gov operates https://en.wikipedia.org/wiki/Nav_Canada
https://www.cbc.ca/news/canada/british-columbia/vancouver-ai...