Reagan’s tax reform wasn’t a gimmick: it broadened the tax base (to encompass more kinds of income) and lowered rate to keep the effective tax rate basically the same.
The biggest problem is we simply doesn’t tax enough. We want to grow the scope of our government to be more like Europe, but we aren’t willing to tax the middle and upper middle class the way they do in Europe. We had an au pair from Germany. Our effective tax rate in a blue state as a dual income professional couple was the same as she paid at her entry level office job.