(FORTUNE Magazine) – Those pennies and nickels jingling in your pocket mean fresh lucre for America's most-wanted white-collar fugitive, billionaire commodities trader Marc Rich. Since 1988, Rich, acting through Clarendon Ltd., his U.S. affiliate, has sold the august U.S. Mint more than $25 million in copper, nickel, and other metals used to make coins. The Belgium-born, U.S.-raised rogue runs his $30-billion-a-year trading company out of Zug, Switzerland. Now Congress wants to know how Rich, 57, made a cozy customer out of the same government that indicted him in 1983 on 51 counts of tax fraud, racketeering, and like charges that carry a maximum 325 years in jail. Congressman Bob Wise (D-West Virginia) called a special subcommittee hearing into the affair and accused the Mint and the Treasury of ''enriching the biggest tax evader in U.S. history.'' Embarrassed Treasury officials promised to consider putting Clarendon on the blacklist for government procurement. Wise got into the act at the urging of the United Steelworkers of America. The union is trying to put the heat on Rich and alleges he finances and supplies Ravenswood Aluminum Corp., a private West Virginia metals plant that locked out 1,700 steelworkers on Halloween 1990 and replaced them with non- union scabs. The Steelworkers are trying to wreck other Rich deals around the globe. In a recent letter to Czechoslovakia's President, Vaclav Havel, union President Lynn Williams calls Rich ''a criminal who represents the worst in American capitalism.'' Williams's plea, strongly backed by the Czechoslovak unions, has blocked Rich's bid to buy one of the country's largest aluminum companies. | All of the partners in Rich's original firm have retired, including fellow fugitive Pincus Green, 57, who lives part time in Israel. Rich's wife, Denise, a 40-ish songwriter, has returned to New York City with one of their three daughters. Rich now squires a blond, 30-ish German divorcee and model named Gisela Rossi, whom he reportedly introduced with pride at a recent awards ceremony for his charitable foundation supporting Swiss artists. Still, how long before the world closes in on Marc Rich?