Just charge me more, don't cut the size down. It's like I'm buying bite sized chocolate bars these days and the price is higher. If I'm going to pay more give me the original sizes.
I prefer smaller portions. If you want more, you can always buy two.
I am guessing there is some kind of political incentive to create stealth inflation (though it's literally 'deflation'), which is largely unrecorded, vs. traditional inflation, which is a vote-loser.