This bet that current total effective tax rates are supra-optimal for economic growth is based on what? (I'm not agreeing or disagreeing. I'm genuinely curious

This bet that current total effective tax rates are supra-optimal for economic growth is based on what? (I'm not agreeing or disagreeing. I'm genuinely curious on your reasoning.) The gigantic topic of the upcoming US elections is how taxes should change, if at all. A few generic options that being presented: a) Don't change. b) Increase on those making $250k+ c) Lower taxes on everyone, while removing loop holes in aims to increase the overall base of tax payers. The argument against option b is that it'll kill investment and economic recovery. That's what this article is disputing. It's not saying that option a, b or c is good or bad. It's saying that the argument against option b that is most often used isn't true when you look at the 65 year economic history of America.