What gives the taxman a right to the fruits of a persons labor? There is of course no other argument for this than "or we kill you". Tax on income is another form of slavery and serfdom. Especially when you consider that a large proportion of slaves through history were free to roam and had to find their own source of income to pay a weekly or monthly fee to their owner.
All other forms of taxation at least have arguments to ethically justify them, including land taxation.
All other forms of taxation at least have arguments to ethically justify them, including land taxation.