There are two misconceptions here.
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That because the block reward will be, let’s say 160 per block, 100% more as it is currently now, it means there will be dilutive inflation. When you and I know this is no true, because if we print 100% more TEZ, and we distribute those TEZ to all tezos participants according to their stake (if Alice has more coins than BOB she will receive more) with a distribution fee of 0% (baker fee), they all will have the double, the coins will be worth, let’s say, half of the value as before (assuming all participants sell 50% of their stash after the 100% minting), but they will have the double of the coins. So no NET dilutive inflation there.
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That there will be some kind of dilution to delegators after the trading fee goes to bakers compared to the status quo. The current status quo is, that bakers receive 100% of the block reward and apply the baker fee to their delegators. If the trading fee of the proposal goes to bakers, then bakers will just have 100% control over the printed TEZ, same as before, then they will be able to apply baker fee to the 100% of the monetary printing, same as before. It would be exactly the same as before. The only difference is that now bakers will distribute more coins to delegators as before, but it will have the same cost to delegators after the baker fee subtraction, and therefore the same NET 0 dilutive inflation for bakers and delegators, as the status quo today. UNLESS, the trading fee doesn’t manage to gather the whole TEZ that it was printed. Then there will be an effective dilutive inflation for both, bakers and delegators. But the proposal propose instead to burn 6% of the minted tezos, which will make bakers unable to apply a baker fee to that fresh minted TEZ.