Liberals never take into consideration the behavior of individuals when changes are made, whether they are tax increases or new regulations. They only think statically, in which behavior stays the same after the change(s) take place. That is why they constantly insist that revenues will go up if taxes go up.
It is like the old saying: If you want less of something, tax it. If you want more of something, subsidize it. Either way, you end up in the red.