= Chrematistics (from Greek: χρηματιστική) according to Thales of Miletus is the art of getting rich.
"Aristotle established the fundamental difference between economics and chrematistics. The accumulation of money itself is an unnatural activity that dehumanizes those who practice it. Like Plato, he condemns the accumulation of wealth. Trade exchanges money for goods and usury creates money from money. The merchant does not produce anything: both are reprehensible from the standpoint of philosophical ethics." (http://en.wikipedia.org/wiki/Chrematistics)
"The term economics comes from the Ancient Greek οἰκονομία (oikonomia, "management of a household, administration") from οἶκος (oikos, "house") + νόμος (nomos, "custom" or "law"), hence "rules of the house(hold)". Political economy was the earlier name for the subject, but economists in the late 19th century suggested "economics" as a shorter term." (http://en.wikipedia.org/wiki/Economics)