The word "Shrinkflation" has been around for a long time. I remember talking about it at university 25 years ago. Interesting that politicians are only now making a fuss about it. Pandering at its finest, as you say. Elizabeth Warren especially is the queen of pandering. At one time I had hopes for her, in her move away from the GOP hardliners to be more of an independent, but geez, she has been pretty much your standard politician since, just doing anything to get attention and not much more.
Greedflation is a great term. I think most Americans don't really understand what inflation is. Prices go up, but beyond that they don't really get it, which is why more descriptive words like "shrinkflation" work in the first place. Adding "greed" there would give more emotion to the word and clue people in about how bad it is. For that same reason, I really want the press to rename lobbying to what it really is: bribery.
At any rate, I agree with you. These giant corporations have been screwing us in one way or another for years. Cut quality, cut healthy ingredients, lower amount. I'm sure eventually they'll revert to the old trick of mixing in sawdust to increase volume. We are suppose to have government organizations to watch over and prevent this kind of thing, but... well, we're back to corruption again.
Anyway, let us know how cooking his original recipe goes!