So, you can simultaneously get benefits from aristocracy and oilgarchy?
The way I see it is this: as new policies are made available you can choose to progress along the branch into the new policy at any time. You won't receive the benefits of the preceding policy in the new policy, simply the new policy will provide new benefits (like Civ4).
Whether these benefits will be appropriate to your situation depends, of course - so you may decide not to continue down that branch and instead start focusing on a new branch, opening up new possible benefits.
Perhaps Ahriman is right, whereby you can receive the benefits of all the branches simultaneously. However you can only progress down one branch at a time, and if you 'progress' down a branch you lose the benefits of the preceding policy in that branch.
This may explain the producer's comment that 'you are always thinking "what new benefit do I want now?".
So you may open up new policies on every branch before deciding you want to change 1 or all of them.
Question: do you think you can jump policies? i.e. continue researching down a policy branch, but not adopt new policies as they become available?
