The Cato At Liberty blog has been reporting on the wave of tax simplification and corporate rate cuts taking place across the world: Poland may adopt a flat tax Iceland and Taiwan to cut corporate tax rates People leaving Ireland due to high personal income taxes Hungarian government considers a flat tax Kuwait cuts corporate tax rate Swiss canton adopts flat tax By contrast, the U.S. federal-state corporate income tax rate stands at 39.3 percent, the second highest in the industrialized world.