Hopefullly the rate of burn is higher then the POS rate.
The specs are 60 sec block time; max PoS reward 2.5 Gam, which would mean a max 1.3 mio Gam per year,
which would dilute the max ICO offering by 50%,
but another piece of the spec says max 5% staking interest, so apparently the average PoS reward is 10% of the max reward?
Anyway - when day trading in BTC, you can double your investment overnight. Granted you can (and I have) failed several times
and lost all I invested, but I made up for it in the last months where I not doubled but multiplied my initial investment by 4x
and I am not a professional day trader, just an average Joe with a full time job and with an account on one of the exchanges.
So yeah, I would be very surprised if the burn rate would not be orders of magnitude larger than the staking rewards.
I rather see a different problem - what if the supply of Gam at the exchange was all exhausted and still BTC are flowing in?
How can you convince hoarders to sell? Offer 1 BTC per Gam?