Dr. Pirie is trying to explain to the audience about the benefits and consequences of foreign goods being purchased by paying in foreign currency and not with the currency exchange rate of America. There are changes made to the prices for buying foreign goods. This makes it advantageous for American citizens because the currency rate is higher for America than most developing and developed countries. The implication here is that a developed country like America must consider the manpower and the lives of the workers working hard in other foreign countries to produce goods for foreign exports.