Think about it very very careful: now we agree with "8% total inflation in the first year, then gradually decreasing". But then, a year later, when we again initiate a vote on the next stage of decreasing inflation, the community may split into two camps (as it always happens), and we will not be able to find a single consensus.

You are wrong. The decreasing inflation schedule will be built into the root referendum that sets it to 8% in the first year. You are basing your motivation on a problem that does not exist. Please read the previous discussions on the topic very very carefully. You can find the necessary resources in each of the previous WFCs.

A great thing about the previous set of WFCs is that the community actually did not split into multiple camps but rallied behind one solution.