Wouldn't these coins actually gain some value over time for the common folk?  Much like the USD, as the difficulty increases the wealth production concentrates more  towards the elite (big rig miners) and the average guy with the average miner like myself will stop finding blocks.  Eventually we'll start protesting that 99% of the wealth is concentrated with 1% of the holders (the big rigs).

p.s. much like the lottery, the fat cats will let us mine away pointlessly in search of our big break, keeping us down and the difficulty up, knowing it is a waste of our cpu resources that could be put to use mining quark.