David, the label of non-essential is a non sequitur - the workers are essential to do the work of government, but the nonessential ones are the ones who have to be constantly on the job. It includes the military, corrections, the Postal Service, air traffic control, and NOAA. You can't run a government with only those workers, but those are the workers who must be there no matter what, essentially 24. Now, if the government is shut down, those people have to work, but, since the non-essential workers aren't working, there would be no one to process their pay info or do any other work, so they wouldn't get paid without a delay, either.
I'd buy one now if it were on the market. Looking for home testers?
This is WONDERFUL!!!!