Raise taxes seems like the logical thing to do.
There are two main points of opposition to this:
1) Economists will tell you that we need to be competitive. Well, all countries seem to be getting more competitive by lowering taxes to attact investment etc, and at the end of the day, we're all doing about the same, except that now we collect far less taxes, and nations all across the world are having massive budget shortfalls as a result. Canada needs to take the lead in reversing that trend.
2) We can't raise taxes during a recession. People are hurting. The people that are hurting, are not the ones who are going to have to pay more taxes. Instead, they are going to be receiving more, from the tax money that is brought in.
It's a sad state of affairs when even the NDP are afraid of suggesting we increase taxes.