If you look at the balance sheet, the US is heavily in debt. If you look at the income account - the amount of interest the US pays abroad - it is almost exactly equal to the amount of interest that it receives from abroad. American assets held abroad are earning a higher rate of return than foreign assets held here.

I'd like to promote lots of things. I'd like to promote elimination of drug prohibition. I'd like to promote parental choice in education through vouchers. Those are two things I think are very urgent and important. They're both more important than the harm which Social Security will do.

What's the difference? How can people be so inconsistent? Why is it that free immigration was a good thing before 1914 and free immigration is a bad thing today? Well, there is a sense in which that answer is right. There's a sense in which free immigration, in the same sense as we had it before 1914 is not possible today. Why not?

You can only make money if you buy a product, whatever it is - maybe a currency, maybe wheat and maybe something else - at a relatively low price and sell it at a higher price than you buy it at. There's no other way to make money.

You will find that hardly a soul who will say that it was a bad thing. Almost everybody will say it was a good thing. 'But what about today? Do you think we should have free immigration?' 'Oh, no,' they'll say, 'We couldn't possibly have free immigration today. Why, that would flood us with immigrants from India, and God knows where. We'd be driven down to a bare subsistence level.'

Because it is one thing to have free immigration to jobs. It is another thing to have free immigration to welfare. And you cannot have both. If you have a welfare state, if you have a state in which every resident is promises a certain minimal level of income, or a minimum level of subsistence, regardless of whether he works or not, produces it or not. Then it really is an impossible thing.

Thanks to economists, all of us, from the days of Adam Smith and before right down to the present, tariffs are perhaps one tenth of one percent lower than they otherwise would have been. And because of our efforts, we have earned our salaries ten-thousand fold.