That addresses the objection but doesn't fully satisfy it. First, not all shareholders are taxed the same way, as the other commenter noted. Second, the tax rate of long-term gains might change before the stock is sold; a fraction of shareholders in the US probably believe that will happen. Third, the dividend tax is collected immediately (on the next tax return), so it reduces how much the shareholder can reinvest unless they take money from elsewhere. Buybacks compound in the stock more easily than dividends.