GS I read your post 3 times and I still can't figure out what you are trying to say. (Granted I'm not the sharpest tool in the shed, but still...)
Are you saying that the Arg Govt is constricted in its monetary policy because it is trying to stem the outflow of reserves? Or are you saying that all the things you mention (inflation, capital flight, subsidy cuts, devaluation...) are the result of dwindling reserves?
Because looking at the K's history, maintaining reserves would not seem to be the priority of their fiscal policy, and they seem to take actions (eg, refusing to implement austerity to stem inflation, generally expanding the monetary base...) that don't prioritise accumulating more reserves, nor do they seem unnerved by drops in reserve levels.
...Actually, I just read your post a fourth time. Do you mean capital controls instead of monetary policy? Either way, would you mind clarifying a bit because it seems like you're making a salient point.