when you say govt contractors, do you mean people who work for a contractor? IE Lockheed, Honeywell, NG, etc employees? or are you referring to something else? if the govt shuts down, im still getting paid, im also essential personnel technically though too...No.
Gov workers will get paid days off.
Military workers will get back pay.
Thousands if not hundred thousand of contract workers will be told not go to work until its settled, and all pay stops. Once work picks back up, pay will start back up but with no back pay.
This really doesn't effect Gov/Military people outside of having money pushed back, the people who do the real work are getting fucked.