Wouldn't this make the bitcoin supply infinite? IIRC the geometrically decreasing rewards is the only thing limiting the total bitcoin supply to 21 million.
At least it'll shut the "the hard limit of 21 million limits bitcoin's usefulness" crowd up.
They can change the algorithm to keep the 21 million limit, and the block reward close to 50BTC for the foreseeable future, for example by adopting
Pieter Wuille's curve. Instead of halving to 25 the reward drops gradually to 44 BTC after a half a year, and 39 BTC after a year. So they skew the curve to mine the coins faster than normal, and leave a smaller profit for miners of the future.
They
can change the algorithm, I agree, but they
won't. If this hypothetical group of rouge miners collectively vetoes Satoshi's original algorithm to protect their profits, then they will also veto any other algorithm which threatens their profits.
In other words, if they collectively chose to reject Satoshi's curve, then it logically follows that they will reject Pieter Wuille's curve. No offense to Pieter Wuille, but he's a nobody compared to Satoshi. Satoshi is literally the God of bitcoin. If the miners can reject the Word of God then they can reject any other community member's suggestion.
Also, assuming the reward remains constant, an infinite expansion is not that bad. After 25 years of constant 50BTC/block expansion the total annual liquidity injected by miners falls bellow 4% of the outstanding monetary base, and that's much less than the FED is printing nowadays. The rebels could also implement a Friedmanian exponential expansion: 50 BTC for 25 years, and then 4% per year expansion after that: 52BTC in the 26th year, 54.1 in the 27 year, etc. This keeps the mining revenue a constant fraction of the monetary base and it's actually quite sound from a macro perspective, albeit inflationary.
I'm no fan of the global fiat printing consortium, but a little expansion of the money supply is definitely a good thing. It's even better when said expansion is:
1. Algorithmically determined (as opposed to a secret cabal of bankers)
2. Completely public (M3 anyone?)
3. Democratically chosen (don't like 4%? Get 51% of miners to join you and fork the chain. Quickest election in human history, with global participation)
This keeps the mining revenue a constant fraction of the monetary base and it's actually quite sound from a macro perspective, albeit inflationary.
Someone correct me if I'm wrong, but inflation only occur when the growth of the money supply outpaces the growth of the economy.
As per point #3 above, the democratic process will keep the bitcoin growth closely matching the bitcoin economy growth. When the two growth rate equal each other, zero inflation will result. Personally I think this solution is much better than both the Fed and Satoshi's 21 million hard limit.
If my understanding of the Austrian school is correct, they're against government-sponsored inflation, not growth of the money supply itself. I wager that the Austrian economists would rank this laissez faire scheme to grow the money supply higher than Satoshi's deflationary measures.