Here in America, I am at a loss to identify ANY tax that is immoral.
Let us remember that all taxes are the result of a majority vote and the voting public can throw the rascals out and vote in new representatives who would then remove any tax demonstrated well enough to be immoral.
We do live in a system of checks and balances, IF WE BUT EXCERCISE OUR DUTY TO VOTE INTELLIGENTLY.
Let us also remember that every tax provides some good or service that the public deems better provided by the government and not by private business. Things like police, firemen, education, roads, etc.
IMO, THE question about taxes, is “Just how much should be provided by government and how much by private business?” I can give the government my money through taxes and let them decide, or I can keep it my pocket and decide for myself how to spend my money, the fruits of my labor.
The more the government provides, the more control it has over our personal lives and the less FREEDOM we have.
TOTAL or near total government control would be immoral, IMO.
Some government services are indeed good, but too much is too much.