also: あくかはりょうかをくちくする
expression, suru verb (irregular)
bad money drives out good
Proverb expressing Gresham's Law: when both high-value and low-value currency are legal tender, people hoard the good money and circulate the bad, so the bad money drives the good out of circulation. Often used metaphorically in economics and social contexts.
See also: グレシャムの法則
The saying 'bad money drives out good' is one of the fundamental principles of economics.
市場に粗悪品が出回ると、悪貨は良貨を駆逐する現象が起きる。
When low-quality goods flood the market, a 'bad money drives out good' phenomenon occurs.