Despite his irrational mania for free trade and open markets traits that he shares with you and a prime example perhaps of derivations at work Pareto still offers a useful schematic for making sense of the complex interplay of contradictory irrational factors lurking behind seemingly rational economic judgments.
The amount and nature of taxation, whether of the income stream generated by a particular investment, or that levied on interim dividends or capital gains realized upon the disposition of an asset, must be among the many complex factors considered by any rational investor in assessing the relative merits of an investment opportunity.