In office, Lucas has been a Minister for Education and Children's Services, Minister for Industry and Trade and Minister for Government Enterprises. He also served as Treasurer from the 1997 election until his party's defeat at the 2002 election. During this time, 1993 to 2002, he was the Leader of the Government in the Legislative Council.[2]
The appointment of Lucas, a member of the upper house Legislative Council, as Treasurer was a break in convention as previous Treasurers had been members of the lower house the House of Assembly. The precedence in appointing a member of the upper house as Treasurer was in New South Wales with the appointment of Michael Egan in 1995.
From 2002 until April 2007, Lucas served as Shadow Treasurer, Shadow Minister for Industry and Trade and Police, and between 2005 and 2006 was also Shadow Minister for Economic Development and Science and Information Economy. During this time (2002 to 2007), Lucas was the Leader of the Opposition in the Legislative Council.
In 2014, Lucas returned to the Treasury portfolio albeit as Shadow Treasurer, following the retirement of the previous portfolio holder and former Liberal leader Iain Evans. He became treasurer and Leader of the Government in the Legislative Council again on 19 March 2018 following his party winning government at the 2018 election.[3]
Two days after the election, he announced on 19 March 2018 that he would be serving his final term in parliament, with an intention to leave parliament at the 2022 election.[4]
