Firstly, to those who look at the Karma leaderboard and think in terms of "the haves" and the "have nots", it took me around six months to go from near to zero to getting onto the leaderboard. If you want to have higher Karma, go get some. Participate in the site more, with posts to educate, inform and entertain, especially in C&C and Karma will flow into your coffers. Take some judicious risks in the Bookie forum. Like in life with cash. Do something about it if you really want the stuff.
The main thing we need to keep going is to encourage or, at least, not to deter Karma giving. It's a joy to receive Karma. Anything which deters giving Karma is probably a bad thing. Karma is a convenient way to comment on someone's post or to give a 'thanks' or 'congrats' or even a flirt or high-five. The passing around of Karma forms tranisent bonds between posters. Fleeting though they be, each receipt of Karma is a little mental reward for visiting EF.
Regarding inflation, to halt inflation you need to find ways to take Karma out of the system as fast as it comes into the system. I think most would like to see more things in the shop to spend their K on although the trouble there is that some of us value holding onto it as we chase down the next person on the list.
We could do with more Bookie events such as lotteries. Real-world lotteries have a pitiful payout but the lure is too much to resist for many. Too few people participate in the Bookie forum.
I've had thoughts of Karma erosion before but I think they're too harsh. You want people to give their Karma back to you via various routes, not have it taken away. I guess another version of the Formula is in the offing.