Wealth centralization occurs in currencies with very large inflation. Wealth is Zipf distributed. Live with it. If you want a coin amenable to progressive taxation, starting with privacy enhanced monero is the wrong place. States will tax bitcoin and redistribute. They are unlikely to redistribute monero. I have respect for the view that better distribution leads to a healthier economy, lifting all boats. I have no respect for confiscation by inflation. Building a bully, a robber, into the coin will not win you friends.
Constant reward solves the problem of mining incentives quite adequately because a non-exponential growth in supply will never exceed the growth of the economy, and thus the reward will appreciate at roughly the same rate as the growth of the economy. It is perfectly balanced, by its very nature. An exponential reward just creates bifurcated dangers: Either it devalues the coin, or else it over-incentivizes miners, resulting in a huge waste of hash (electrical) power. The probability of reward value tracking the growth of the economy is approximately zero in an exponentially growing reward system.
Personally, I would not invest in a currency with exponential supply, period. It has no future because it will not be adopted by the majority of users. It will fail to attain monopoly control if its niche. Since I am not going to be invested in such a currency, I will never use it: I have a disincentive to use it because that detracts from the currency in which I am invested. I think this is a majority view, among cryptocurrency early adopters. Thus it would be ill-advised to invest time, energy, creativity, or funds into such a currency.
Constant reward is superior to bitcoin. And that's a very favorable thing to have said about a fledgling crypto. The history of exponential money supply growth on the other hand is a history of disaster and tragedy.
I cannot disagree more. You're telling me you want an anonymous coin, that has high adoption, that perpetually increases in value, that is resistant to centralization
and comes at no cost? Good luck.
Wealth centralization occurs in currencies with very large inflation. Wealth is Zipf distributed. Live with it.
We're all going to die someday. No point in being healthy, I guess? Fixed inflation can greatly discourage wealth centralization.
Constant-reward inflation is effectively a fixed money supply. Not to mention a constant reward is the same as a
decreasing reward, which is the primary concern that started this debate in the first place!
I find these posts from AnonyMint to be quite relevant:
In the Quantity Theory of Money a constant money supply requires that the economy can grow only if the velocity-of-money circulation rises exponentially or the price level declines exponentially, neither of which are plausible for a healthy economy.
we can't have freedom without diluting the money supply. Selfish savers want their past efforts to be a perpetual friction on the backs of those new innovators. Rather a small, reasonable debasement (or demurrage) provides a balance to neutralize the parasitic rent that usury has on society.https://bitcointalksearch.org/topic/m.3816209https://bitcointalksearch.org/topic/m.3788809https://bitcointalksearch.org/topic/m.3788782........
Why are you so selfish as a saver that you don't want to pay 2.5% - 5% per year to fund the security of mining to keep it decentralized so the government can't come tax + confiscate 50+% of your savings? You know that even gold is debased at 2 - 2.5% per year.
The new coin goes out to the people who are the miners, especially with a
provably cpu-only coin.
The increased value of the coin and the increased productivity gains (Q in the Quantity Theory of Money) in the society due to not having the government meddling will far exceed that 2.5% - 5% per year cost.
Selfish people deserve the corporate top-down controlled fully compliant government's coin. 
