Free trade is justified regardless of the trade policies followed by other governments. A foreign-government’s restrictive trade policies or subsidies or high taxes or low taxes or screechy national anthem does not justify your home government restricting the freedom of you and your fellow citizens to trade as you choose.
Your government should take other governments’ trade and economic policies as given, much as we take consumer tastes and preferences as given.
If your neighbor offers to mow your lawn for free because his psychiatrist recommends such mowing as a sure cure for his depression, should you refuse his offer? If your neighbor offers to mow your lawn for free because he is convinced by some silly book of the wacky notion that exports are good and imports are bad, should you refuse his offer?
If your neighbor chooses to become utterly self-sufficient, refusing to consume anything produced outside of his own household, you might properly regret (1) that he and his family will likely become much more materially impoverished than your neighbor realizes, and (2) that you and other people in the economy will be deprived of the additions to total output that your neighbor would have added had he chosen not to cut himself off from the larger economy.
But ultimately it’s none of your business. You have no right to insist that, in the interest of a larger GDP, your neighbor must integrate himself more fully with the outside economy.
Now suppose that your self-sufficient neighbor, still refusing to consume anything not produced by his own household, offers to sell to you — say, in exchange only for a friendly smile from you — some tomatoes from his garden. You examine his tomatoes and determine them to be first-rate. Should you refuse to accept your neighbor’s tomatoes in exchange for a quick smile, on grounds that your neighbor will not, in exchange for his tomatoes, really purchase anything from you or from the outside economy? Would you make yourself richer by refusing his offer?
You may legitimately question the wisdom of your neighbor’s policies. But regardless of what you conclude, your best course of action will always be to trade freely with him, and with everyone else.
