History. In five of eight, the new tax became law by 31 December as planned or stronger. Once it was softened, once removed, and once the budget came late.
Hunch. The government has said it is open to changes, and on 9 November la Repubblica reported it is studying a change that would raise the starting level so that only millionaires pay.
The no-softening market resolves on the same journal, against Article 17 of the plan: YES if the law published by 31 December keeps a rate of 26% or more, a starting level of €800,000 or less in investments, six of ten years in Italy, payment within 180 days, and half paid at once with a guarantee for moves within the EU, with no new exemption. It is NO if any of these changes in favour of the payer or there is no law with the tax, a simpler procedure alone is not softening, and ANSA and Reuters are the backups.
We looked for cases where a government put a new tax that only wealthy people pay into its yearly budget plan, and parliament had to pass the budget by 31 December. We found eight such budgets, for the years 2012 to 2026, in France, Italy and Spain. Four of them were French, and two were Italian. (Senate of France; Normattiva; Boletín Oficial del Estado)