This discussion highlights the success of false dichotomies. Capitalism v. Socialism or Welfare State notions, vs. simply going back to classical economics. https://www.progress.org/articles/how-land-barons-industrialists-and-bankers-corrupted-economics So yeah, a tax on land (rent) and the elimination of a good many other taxes would probably be beneficial especially taxes on profits.
In theory by allowing reinvestment of the saved money. In practice not really; I find that investor sentiment is a much stronger driver. I'd support tax cuts on publicly traded companies (some private exceptions) if it wasn't just handed out as dividends.