IN Argentina, where one in five people is unemployed, one game show host doesn't ask, "Who Wants to be a Millionaire?" Instead, the question is more mundane: "Who wants a job?" One of the country's top-rated programs, Human Resources is a game show that reveals how far the one-time richest economy in South America has fallen. In the midst of a four-year slump that has battered the peso and pushed half of Argentina's 34 million people into poverty, it offers its two contestants a shot at a job.