I don't see why not for steem and steem dollars, but you'd want to keep all your vests in one account for voting power. Prying eyes, like the taxman, will still easily be able to see how much you've made.

I'm actually curious to see if this will work in our favour, in a mixed up kind of way. Imagine if there were thousands or even millions of people, making money right out in the open - publicly flouting the tax code. I can't think of a tax authority which has the resources or the level of competence to attempt to track down or audit millions of citizens. It might well mean that people decide to call that bluff.