You are making the assumption that every individual would hire their own security, vs banding together to pool resources to hire security. I dont presume to know how the society would implement security beyond the current structure. Thats not really the point though, because its such a complex issue that is not truly what we are talking about here.
If you don't presume to know how society would implement security outside of this structure then you certainly can't say that a socialized army is a less efficient way of doing it.
Its why I summed up your argument as socialism being about organizing resources which includes labor and directing to efficient uses. Its far less productive to try and argue a topic through a "what if" because the parameters are almost endless.
The issue is, can government create more jobs than the taxes is levies ends or holds back?
And the answer there, at least to me, is clearly "it depends on the situation and the sector".
