This sure sounds like conspiratorial thinking - unless you have any evidence thereof. A quick bit of googling found this: https://www.destatis.de/DE/Themen/Wirtschaft/Preise/Verbrauc... which sure seems to suggest the basket was last changed in 2015 (i.e. this isn't something being fiddled by anybody, let alone on a political whim - it's too slow moving for that). And the actual inflation currently using that system is 4.1-14.3% depending on which of the three baskets you're looking at.

Also, consider that inflation numbers are necessarily lagging reality; they're not updated live by tracking residents or anything like that. For example, september's numbers are available and quoted above, but October's are not (and are projected to be higher).

This kind of conspiratorial thinking is harmful; it reduces trust, and thereby encourages everybody to skimp on the rules making everybody worse off. It's a classic prisoner's dilemma - we're better off just not playing that game. I'm sure the process of inflation-computation is imperfect, but let's talk about concrete, verifiable problems or better yet suggestions for improvements instead of nebulous feelings of disagreement.

By the looks of it, the official statistics confirm that inflation is spiking, but simply not yet to dramatic numbers (i.e. the kind of numbers that instantly change how we all think about money). If you feel that inflation is significantly higher, then why?

The official numbers are around 4.5% to 5% and everyone knows it's a combination of higher energy prices, more taxes (VAT rebate is gone, CO2 tax is up), shortage of materials and reopening of the economy.