They have government contracts. I have a "vested" interest in this story...if you get my gist. 
Interesting, we get no retirement funds from Hubby's company, but before I retired we did have a 401K with match and we did what was most non advised. When the 401K went up every couple years we took a loan for half , paid off the car, house and credit cards and paid it back weekly through our pay checks.
When I was forced to retire due to health problems, I with drew all money and slammed it into the bank for what 1% interest. Better then leaving it to loose it all due to the economy, one year I lost $8,000 and I was not going to take a chance on that happening again.
We are looking at the future, with home, cars and credit cards paid off we owe no one but town taxes and federal taxes , land rent on Hubby's salary.
When the SHTF, we can walk away and live on the road with our #SS and the money we have stuffed under the mattress.
Heck of a chance we took but at our age, in late 40's we went for it. Today 20 years later I realize we made a mistake buying our home and the money pit it has become.
So lucky we had health insurance along the way, I had 2 bad accidents OSHA reportable that were Sue able but I do not sue people, they were accidents, and I wanted my Job.
We don't know what is coming down the road but we do not want to beholding to any one.