Treasury schemes robbed 3 million Colombians of 80,000 , officials say . Many businesses promised returns as much as 150 percent . Pyramid Minister Munoz says government warned against schemes . Authorities tracking down people behind businesses , many of whom have escaped .
Pyramid schemes robbed 3 million Colombians of at least $ 200 million , officials say . Many businesses promised returns as high as 150 percent . Treasury Minister Oscar Ivan Zuluaga says government warned against schemes . Authorities tracking down people behind businesses , many of whom have escaped .