Sampson has a Bachelor of Arts degree and an MBA from Queen's University. Sampson worked at the Toronto branch of the Toronto Dominion Bank from 1980 to 1987, and at the Toronto branch of Chase Manhattan from 1987 to 1995. He also worked for Brays Lane Consulting in 1995, and is a Fellow in the Institute of Canadian Bankers. In 1992-93, he was an Executive Member of the Planning Advisory Committee for the City of Toronto.
During his time as Minister of Privatization, he was best known for sale of the 407-ETR Major Highway for $3.1 billion. The highway was sold to a consortium including the Spanish company Grupo Ferrovial and its subsidiary Cintra Concesiones de Infraestructuras de Transporte, SNC-Lavalin, and Capital d'Amerique CDPQ, a subsidiary of the Caisse de depot et placement du Quebec.[3] The sale was heavily criticized as being well below value. It was estimated that the cost of acquiring the land exceeded $100 billion since the 1970s.
Sampson was re-elected in the new riding of Mississauga Centre in the provincial election of 1999, defeating Liberal George Winter by over 4,000 votes.[4] He was promoted to Minister of Correctional Services on 17 June 1999.[5] He stepped down from this position on 4 December 2000 to demonstrate ministerial responsibility after a backbench Tory named Doug Galt listed the names of several young offenders in the legislature; he was returned to his position on March 8, 2001.[6][7]
Sampson is a committed Neo-conservative, and supported numerous right-wing economic policy initiatives during his time in government, including the controversial privatization of Highway 407. As Correctional Services minister, he promoted the privatization of Ontario's prison system despite warnings that this could result in decreased safety. Sampson was dropped from cabinet when Ernie Eves succeeded Mike Harris as party leader in 2002.