Even though the article at the top of the thread points out the futility in dealing with BashBots, and in spite of the fact that you are unwilling to address my questions to you about the roles of Levin, I will speak to airport security.
No one favors more federal employees, but if one is to be objective, both sides of the coin need to be examined. The BashBots can say that it was Bush, acting totally by himself, who decided to federalize the screeners, but by doing so, they show their ignorance and /or dishonesty. The reality is that there was imput from everyone concerned, and likely included Congress, agency staff, airlines, airport management, security contractors, passengers.
There are numerous justifications but let me limit myself to the one that seems most important to me: If the passenger says that there needs to be more security while the passenger also says that he doesn't want to pay for, or deal with the nuisance of, more security, then the only option is to inject a higher authority.