1) Not sure, ask chrome-rome
2). I can answer this (Since I am actually going to be helping with the policy systems
) It works like so: You have 3 pages for policies. The first page is Governments. You can only have one at a time. They provide a % bonus to things like gold, food, science etc empire wide. They also have policies whithin them that provide different powerful bonuses.
The second page is for Government Ideologies, things like Capitalism, Socialism, Nationalims etc. They act somewhat like normal policy trees. They also clash with some types of Governments, and other Government Ideologies.
The third page is for Government Systems, such as Electoral, Totalitarianism etc. These also act like normal policy trees, and some clash with other Governments, Government Ideologies, and Government Systems.
Religions and Religious Ideologies will be added as more social policy pages, but at a later date.
Hope that helps