The strategy of doing that has a little problem... because it defies decentralization (at least in the early stages). If in place, one could buy a TON of supply and instantaneously dominate the chain, breaking security and decentralization.

...otherwise, it becomes PoS due to the way staking works.

Having that said, over time, pruning inflation+block generation might be a good technique... how hard the pruning goes... may depend on some factors. But that's already something "ongoing". Adjusting to the right amount is usually the harder part.