Non-democratic? After a quick a-Googlin', it seems like the income tax was made legal by the 16th Amendment, which has been properly ratified by 42 states.
My bad, I am confusing with the Federal Reserve Act, which was drafted in secret meetings and passed into law three days before Christmas. Yet, one cannot ignore that when the 16th amendment was passed, federal income tax was 2% and required 2/3 of the votes to pass, subsequent increases only required >50%. A 35% rate for middle class incomes is a far cry from 2%.