and, in the context of the article, it's because they figure that millions of dollars in taxes are enough. It's certainly millions more than I'll ever contribute.
To clarify, Dart Industries the corporation has been fighting against paying their taxes and that doesnt set me off. However, the two Dart Brothers named above will not pay ANY personal income tax having renounced citizenship. They are part of ownership. If it could be done, I would like people like this barred from ever setting foot in the US ever again..