It is fairer to tax people on what they extract from the economy, as roughly measured by their consumption, than to tax them on what they produce for the economy, as roughly measured by their income.
In a Democracy, look how many Demagogs that is how many powerful Orators there are with the people.
A democracy is no more than an aristocracy of orators. The people are so readily moved by demagogues that control must be exercised by the government over speech and press.