In theory, relatively poor people should be easy to coerce into different behaviours with taxes. In practice, that doesn't appear to be true. e.g. We've seen that carbon taxes on fuel don't really change vehicle purchases or behaviour at the pumps to a large degree unless the taxes are set very high.

It shouldn't surprise anyone that wealthier folk aren't moving to different countries over a tax that is smaller to them, in relative terms, than carbon taxes are to the poor. What is money for, after all, if not to enable you to live the life you want to live? If you need to move to Dubai to avoid taxes, how can you consider yourself wealthy?