"Purchasing power parities are not a reasonable method for comparing households across countries or currencies. The reason for this is simply that PPPs are sensitive to the prices of all the commodities, goods and services, that households are consuming worldwide, with each commodity weighted in the calculations according to its share in international household consumption expenditure."

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It is not realistic or hard-headed to solve problems and take action unguided by ultimate moral aims and values, although we all know some who claim that it is so. In my judgement, it is thoughtless folly. For it ignores the realities of human faith and of passion and of belief; forces ultimately more powerful than all the calculations of our economists or of our generals. Of course to adhere to standards, to idealism, to vision in the face of immediate dangers takes great courage and takes self-confidence. But we also know that only those who dare to fail greatly, can ever achieve greatly.

— Robert Kennedy