In other words, the purchasing power of all money would be reduced. This would be beyond the control of the individual and would very clearly be unfair. Some say that inflation is like a hidden tax.

Why tax?

The main purpose of taxation in these nations is to control inflation (though it can be used for other purposes, as is the case with ‘sin taxes’). By forcing a certain amount of money to be taken out of circulation, economists can ensure that there isn’t enough spending power available to allow people to bid up the prices in the areas being taxed, but not so little that deflation occurs.

Regardless of whether you’re losing out because of inflation or taxation, both situations are unfair. While taxation isn't fair, it's often seen as the least unfair of the two, which is why we continue to pay taxes.