I'm saying that some things - for example, slavery - can be proved to be morally wrong without having to perform an examination of the material evidence against it. You wouldn't have to carefully study the conditions on slave ships and plantations to vote for abolition.
> I'm saying that some things - for example, slavery - can be proved to be morally wrong without having to perform an examination of the material evidence against it.
Taxpayers recieve benefits from paying tax. Slaves (those that didn't die) did not.
Taxpayers are able to assemble to discuss the matter, lobby their representatives, campaign for change, vote for the change, campaign for office. Slaves were not.
Taxpayers are free to leave the country and go somewhere new. Slaves, suprise surprise, were not.