> If paying taxes were part of morality, it would require to fix the tax rate once and for all. Otherwise, such moral rule would simply hand out a blank cheque

> If paying taxes were part of morality, it would require to fix the tax rate once and for all. Otherwise, such moral rule would simply hand out a blank cheque to the ruling class, which could ask for whatever taxation amounts No, you could totally say that it's moral to pay taxes, but that we don't know what the correct amount is, or that the correct amount depends on circumstances. The 'ruling class' does effectively have a blank cheque - who do you think sets the taxes?