Well guess which one companies and politicians are going to use to make themselves look better, or our ask unreasonable.

And which one affect the money in my account at the end of the month from the expense side.

I make what I make (RES Guarantee) barring a new way of paying, that's not going to change dramatically. And I'm sure the company will try to peg it to Core, IF they admit it needs to even match inflation.

What I pay out each month is more affected by Headline CPI and not CORE CPI.

Food - Can't avoid eating. And this has gone up at least 30% since 2019. Closer to 50% if you avoid ZOG foods.
Energy - I can cut back on vacation, but there is a baseline of "non optional energy use" such as heating my house, driving to work, driving to doctors office, grocer, etc.
Apparel. - Honestly, I don't spend much here. I have jeans old enough to vote. And concert shirts that will probably start getting AARP mailers soon.
New and used vehicles.- HOLY CRAP YES. We went to replace my wife's 4Runner with a new 4Runner.. Same options, trim "just this but new". Car was $36k in 2012.. Adjusted for official inflation, $48k for the new one. NOPE, try $65k
Commodities (medical care commodities and others not food- or energy-related). meh, dont' see it, but I know it's baked in.
Alcohol and tobacco products. Don't really consume enough beer (I make my own) to have it move the budget needle, but grain/hops cost 1.5-2x what they did 3 years ago.
Other Services.
Shelter. Housing is probably the closest to "FIXED" but I have had the escrow part of my mortgage more than double since 2015.
Medical care services (hospital and physicians’ services). DPMP isn't cheap.