Any such tax could push Mexico into bankruptcyand force the United States to construct a 1.400mile wall on our border from Brownsville. Texas. to San Diego. Calif.. to stem the potential refugee tide. Since Dec. 16. when the OPEC nations effectively signaled the end of their worldwide oilpricing cartel and announced "every man for himself" in the pursuit of their dwindling share of the world market. Capitol Hill has been abuzz with talk about its being "time for an oilimport tax." Now when the U.S. economy and consumer are in line for the added stimulus of as much as $2030 billion in lower crude oil prices from a deregulated oil market.