That would require moving to PoS.
I was waiting before I responded to this, for some explanation on why inflation doesn't solve anything, which BlackHatCoiner made excellently:
For example, if you hold 1 bitcoin in an address, you will be rewarded 0.02 bitcoin after holding it for 1 year.
You don't fight anything this way. If, given that the interest rate is 2% annually, all users were entitled to this reward, it'd nullify its purpose. If
everyone became slightly richer, with constant national gross product, then nobody would actually gain anything. Prices would just rise, that's all.
Inflation and deflation are complex problems, that require complex solutions. Commonly political problems. That's why you shouldn't try searching for a simple technical solution.
PoS coins that provide everybody subsidiaries, also have inflation problems.