Getting out of phone contract

Well, I am operating on the assumption that having some form of army/navy/body of people whose job it is to maintain sovereignty is a handy thing to have.

It would be rather churlish not to support them if one believes them to be needed?

If they were protecting our sovereignty,then fantastic. But they are not so why do we need to support them?

Otherwise your logic could be applied to support a child molesting teacher. Their purpose is to teach (which at least the teacher is doing) but there is the slightly off key side effect of them sometimes raping kids.

The soldiers chose to enter into fixed term phone contracts, knowing they might be sent away.

So yes support them when they are actually serving a sensible or righteous cause, but this one is not. I would still think there are better ways to support the military and armed forces rather than just helping out the ones too stupid to realise a fixed term contract may not be the best idea given their chosen profession.