Why does anyone think 100% PoS is a good thing?
Who wants money with 100% inflation every year?
Seems like it would have been better to leave it at 50% to me, just my 2c
You would only get 100% at minimum difficulty, every 64X difficulty increase the reward drops by half down to a minimum of 50% (100%, 75%, 62.5%, 56%, 53%, 51.5% etc).
There is a cap of 30 Coins per Block to Stake so the maximum amount per year is limited to 15,768,000 Coins.
The increase in Stake reward is to offset the cap on Blocks and if doing something as radical as changing the whole reward system, it would need to be more rewarding to gain the majority vote. It's less about actually giving a higher percentage per year though and more about encouraging use of smaller Blocks to create a more secure network.
Besides, in about 2 weeks it will be Proof of Stake only so that will take away all that extra POW sell pressure.