I agree with Beornin and Avari.
If anybody tries to argue, Karl Marx will pwn you:
Credits are by themselves have no value. They are means of exchange. And the basis of your exchange is labour. All value that you have in this game is through to your labour (ie. you playing the game).
Inflation by itself is not a problem, because you compensate the increasing let's say clump prices, by the higher price you sell the lootright for.
If you barter a set of CSS for a set of CC, it means that the effort of making these two sets is equal. It is completely irrelevant how much creds they go for, because the effort to obtain them is the same (and statistically it is indeed the same).
As long as you have players playing the game and not just a bunch of whiny kids wanting to buy lootrights instead while doing nothing else, you will have a working economy as well.
Instanced raids give access to all players to prosper and this is what differentiates this game from real life, or pre-2012 AO. The difference between rich and poor was MUCH greater back then.