We call them our elected representatives

“Sir Thomas Gresham, writing on the coinage, lays it down as a principle that, if you have in a country good coins and deteriorated coins of the same metal current side by side, the bad will drive out the good, and Gresham’s law may often be applied to literature, to art and, especially, to journalism. The largest circulations have often been attained by newspapers not exhibiting the highest characteristics; indeed, newspapers have been known suddenly to reach enormous sales by publishing articles describing the careers of notorious criminals.” — from The Cambridge History of English and American Literature, Vol. XIV, Ch. IV