1. Like many others, I'm for legalizing marijuana and taxing it, and making the legal age to obtain it twenty-one, or maybe a doctor's prescription, but legalizing it, thereby eliminating the criminal control of it and making it a legitimate business that would have to pay legitimate taxes, just like the alcohol and tobacco businesses (and it could be required to carry the same kinds of warnings etc.).
2. Religious organizations shouldn't be exempt from taxes, but in fact should be required to pay taxes on all property and profits. Why should we be outraged at the CEOs of banks and car companies riding in private jets and paying for million dollar bathrooms etc. that are at least taxed while CEOs of various religions and religious organizations fly around in their tax free private jets and build their multimillion dollar mansions etc. (I know there are many churches that do not make a profit or devote their profits entirely to provable charitable works etc. but the former wouldn't have to pay any taxes while the latter could make use of all the charity write offs that already exist etc.)
3. I think we should make it the law that if any individual is found to have avoided paying their fair share of taxes through offshore banking, they should lose their citizenship, and same for corporations that put their headquarters offshore to avoid paying taxes here, they should be banned from doing business in the USA. Maybe that would keep a lot of the wealthy and the corporate from using offshore banking and headquarters to avoid paying their fair share. (I know, the corporate part of this one would be difficult to enforce and some, rightwingers especially, will argue that it would lead to corporations leaving the USA altogether. But I doubt any corporation would want to be banned from this country and its consumers, even to save on taxes.)