Really? When I was in Europe we could never find restrooms (or water!) without shelling out a few Euros. And even when we bought water, it was usually not refillable, it was in a glass bottle. And the metros still had beggars coming though each car asking for money and sleeping on the ground so clearly homelessness can't be solved by raising taxes alone.

High taxes also have other cons and negative effects that are out of the scope of this particular argument.