Corporate greed is behind inflation

*Corporate greed, not wages, is behind inflation. It's time for price controls.*

Rigid price controls cause a different kind of market distortion. I wonder if there is a way to get a similar effect but less rigid. For instance, what if any increase of X in the price of a product resulted in an additional tex starting at .9X and decreasing linearly over the following year down to .1X, then ending after that year. This might discourage price increases that are not meant to be long-term.