I don't think it has anything to do with rank. It has to do with the values influenced
by the way you were raised. Mostly your comrades become your family after your second tour. The military has favored the Republican Party due to them looking after the military's welfare. I have been soldiering now for 32 years. It's just my observation.
I know on my last deployment ,Guard and Reserves were not allowed allotments.
All my money went home. I had a special Visa account money was put into. Hell there was no where to spend it anyway. It appears to be a very small percentage donated anyway. I wonder how they track it.
FWIW: Out of four E-4 and below that I have in country, three have extended their one year tour already. I have talked to two
and asked why. Both stated in different ways that they thought it was the right thing to do.