When it was announced in August that fast food giant Burger King had purchased Tim Horton’s, a Canadian coffee and doughnut chain, for $8.4 billion and was moving its headquarters from the U.S. to Canada, it surprised some, but shocked no one. What it did do was irritate lots of people in Congress. Some called the plan of America’s second-largest fast food chain to move out of the country unpatriotic, but beneath all the bluster, the outrage was all about lost tax revenue. The idea of a national corporation moving its main offices out of the country isn’t new,…