If I was going to "live off of what I killed" I can guarantee you my gun wouldn't be any kind of handgun!
(Unless, of course, I was "taking down" convenience stores.
History fails to record a single precedent in which nations subject to moral decay have not passed into political and economic decline. There has been either a spiritual awakening to overcome the moral lapse, or a progressive deterioration leading to ultimate national disaster.
If you think a strong military is expensive, think about what a weak one would cost