I search the threads for gas taxes and found a few but didn't see any comparing the rates between different countries. Here is a good resource:
Almost without a doubt across my travels...places with cheaper gas had much more "unpleasant" (I'm being nice) and inefficient city designs / transportation plan. (Unless you think traffic is good...more on that in another thread. I have a really cool photo from Thailand courtesy of our friends at Toyota)
Indonesia - Around 25 cents a gallon if I'm not mistaken. I'll have to look at a picture I took at a photo in my archives.
Thailand - Gas per litre is subsidized and kept artifically low by the government. At least 3 Baht/litre. (Which is 8 cents / litre or so). More significant than it sounds due to the cost of living there. Lots of discussions about this in the newspaper.
I forget what the actual cost/litre is...I'll look it up and post later.