As you spotted, the First Church of Potrzebie is indeed based upon the philosophy of the eternal struggle of want versus need. Essentially it stems from the old maxim "waste not, want not" which roughly translates to "if you don't waste it, you don't want it".
In the words of our fully-licensed Messiah:
In the words of our fully-licensed Messiah:
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'