Yes, it serves the political interest of "I need more money"
Google "build on a patent", here's on example of what I'm talking about:
"Your brilliant idea needn't fall by the wayside simply because you don't want to deal with the patent process."
Due to the Berne convention, we don't get to have that comparison. Although lots of people argue that China's weak enforcement of non-Chinese IP has had rather a positive influence on their industry.
There's a good history of patents and cartelisation in "Information Feudalism" http://www.amazon.co.uk/Information-Feudalism-Owns-Knowledge...