There was no tax revenue to start with. Growing is a pretty involved task especially in this climate.
now is the time to make growing it and selling it illegally (there is a legal path) a way to financially ruin your life and take away everything you hold valuable. That will give them cause to follow the law and pay the tax.

This is exactly what was done with guns. We now pay $10 per transfer, you can lose your right to even own a gun if you don't follow the law, etc etc...

Like I said, it is time for payback. Let these fuckers know what it is like for liberalism to give them a strong backhand in their life. See how they like the man then....