Every economist in the world can quickly explain how a 10 percent tariff on imported steel will lead to corruption. The same logic applies to drug patents, although since they are the equivalent of tariffs many thousand percent (they typically raise the price of protected drugs by factors of ten or even 100 or more), the incentives for corruption are much greater.
This is why every economist in the world should have been nodding their heads saying "I told you so" when they read this NYT article about a kickback scheme between a major drug manufacturer and a mail order pharmacy. Unfortunately, there were no economists mentioned in this piece. And, it is quite possible that most economists support this form of protectionism, in spite of the enormous inefficiency and corruption that results. (Yes this is a major point in my book, Rigged: How Globalization and the Rules of the Modern Economy Were Structured to Make the Rich Richer.)