I get it. I just don't necessarily agree with it. Seems like the First Amendment would trump office policy, and that being fired is a punishment by the government for expressing incorrect thoughts. The argument about "trust" is highly speculative, whereas having to waive basic rights as a condition of employment is more clear-cut. Sure, being in the role of employer is a wrinkle, but it's still the government making a rule and enforcing it. Losing your job isn't as bad as going to jail, but I don't think it has to be in order to qualify as coercive.