This is some serious bait and switch bullsthit. Changing from income tax to net worth tax will require all the asset evaluation you claim to want to avoid because of "practicality."

"net_worth" is a serious tell. The wealthy will simply purchase money laundering assets to offset their revenue generating assets. The result is that they will have zero net_worth and legally pay no taxes at all without having to hide assets offshore.

It will be those in the middle-class that bear the brunt of this plan.

Progressive income taxes work quite well. A wealth tax of 1-2% above € 20 million or so would be a smart way to reduce income inequality so that we increase democracy by not having so much excess wealth being used to buy politicians.