I can see where he's going for this, but the background is bare. Perhaps rusty steel would be too much of a Cliche, concentrate on something more simple (not camo either) and avoid olives.

If its music for the institutionalised, look at institutes, look at Communism in Russia in particular, a theme I think would fit nicely into the background, if you found the right way of executing it.

I understand you want minimalistic, but at the end of the day it has to SELL - the reality is that it's going to get piled onto a shelf amongst thousands of other CD's with brighter and bolder designs, you need to add something to your fundamental there to give it that something that will make your CD cover stand out from the rest.