In the Department of Finance, Carney was responsible for the "income trust" file. Think of income trusts as the equivalent of a profit sharing investment vehicle that was popular with Canadians seeking retirement income. Income trusts, were however, not popular with the CEOs of Canada's large corporations (many of whom were Mark Carney's former/prospective clients while at Goldman Sachs), since income trusts placed corporate governance in the hands of investors (as opposed to CEOs) and served to lessen the abusive compensation earned by CEOs.
This friction between investors and CEOs came to a head in 2006 and CEOs lobbied the Canadian government to shut this form of investment vehicle down (against the interests of their shareholders). Under Mark Carney's directive, the government sided with his former/prospective clients, the CEOs. To bring about the CEOs desire to kill income trusts, Mark Carney resorted to the completely false (and hence fraudulent) argument that income trusts were causing the government to lose tax revenue (when income trusts actually enhance the gov't's tax collection).
This is where Mark Carney proved himself to be guilty of gross conflict of interest, because the policy that he championed caused 2.5 million Canadians to lose $35 billion (yes, billion) of their hard earned life savings, and all Canadians to lose an essential retirement income investment vehicle, when the government announced a double taxation of income trusts.
Mark Carney's policy was premised on a total falsehood (alleged tax leakage) and caused a major loss to investors, while advancing the narrow interests of Corporate CEOs, who were his clients and prospective clients while he worked at Goldman Sachs.
Mark Carney = Gross conflict of interest.
I wonder what policy scams he'll will hoist on British citizens?