Probably inevitable that U.K. government will impose a tax of one kind or another at some point.
The loss of VED in future years will need to be replaced.
I think it is an astute move by the Victoria government bearing in mind that they recently introduced $3000 grant on new EVs which is on top of the non imposition of stamp duty and free registration.
Those perks will surely be the focus of buyers and not the new tax.
After a few years EV owners will have got used to the tax which will probably increase over the years as the incentives drop away.