On the flip side, one could also argue that as a public employee, everything that congressman does should be on the public record out in the light for everyone

On the flip side, one could also argue that as a public employee, everything that congressman does should be on the public record out in the light for everyone to see, and that the best security would actually be zero security. This would also have the positive side effect of making it really hard for public employees to engage in corrupt and illicit behavior (which, as we all know, is so rampant that it's practically industry standard at this point).