This is actually starting to sound like a far better currency than bitcoin could ever be. You know, a liquid medium of exchange rather than a deflationary libertarian wet dream.
Moreover, there is an issue of keeping the incentive to mine. The theory is, that when a coin is mined, and when it will become popular, there will be a lot of transactions, and the fees will make up a large sum worth mining for. But that's only a theory, it wasn't seen yet. I feel it is much better that miners can still mine their 10k doges per block.
Yet another reason is, that certain amount of coins is being lost forever due to human errors. So the increase will be even less.
Hoarding and speculation is killing Bitcoin. I initially discounted Dogecoin, but it seems that smart people are behind it and the whole thing radiates a lot more positive energy than the greed radiating from Bitcoin.
All the best ideas are jokes.