[Canada taxes business investment more heavily than any other competing nation except China -- and taxes on Canadians' personal investment income can reach 80%, according to a study released yesterday. The findings underscore the need for a dramatic overhaul of the tax system to cope with growing competition from Asia and an ageing population, the C.D. Howe Institute said.] Given the competitive and demographic challenges facing Canada, tax reform is increasingly urgent, ... In the coming years, Canada should not simply react to changes in tax policy abroad, but should take the initiative and adopt policies that would unleash the Canadian tiger. Jack Mintz