Across Europe, "fuel taxes vary greatly [...] [taxes account] for 65-80% of unleaded petrol price and 60-80% of diesel prices"[0]
All those [EDIT: hundreds of] billions raised from the sale of petrol and diesel is going to have to be found somewhere else instead.
Taxing electricity more, or taxing charging - or driving - somehow, or by taxing the sale of EVs themselves?
[0] https://www.eea.europa.eu/publications/ENVISSUENo12/page024....