When you start with a blatant ad hominem...nothing else you write should be treated seriously. But I will anyway. For a relationship to be causal, one must be able to rule out spurious correlations. The Forbes article is quite deceitful in various ways but especially in treating correlation as causation. Although seeming cliched, it is nonetheless true, correlation is not causation." Increases happened when max tax rate was increased. Increases occurred post recessions. You can't ignore these other factors but then claim it was your preferred reason but not the others.