The big problem with this is that, under a simple tax system, if a government wants to increase it's tax revenue it is extremely easy for voters to understand what is happening. Governments prefer to make complicated tax laws because they are easier to spin.
I can answer this question since I accidentally created a circular reference the other day. It starts syncing the recursive structure until it runs out of quota.
This is a very naive generalisation, but, as far as I understand, psychopaths can be very good at assessing other people's mental state, but do not /feel/ it like most people do. People on the autistic spectrum find it very difficult to recognise what other people are feeling.
This could be a browser permission based feature, like location is at the moment. The app asks the browser to prompt the user to give permission for this domain to "Control your mouse pointer". The cursor should always be released when you alt-tab away or press the ESC key (maybe the would need to be a time limit within which the mouse couldn't be captured again).