[3][4] In September 2016, Cadogan voiced opposition to ANZ Bank's proposal to close its branch in Milton, describing it as a "battle between a small community and a huge corporation".
[11] In May 2019, Cadogan blamed several released North Island prisoners, who had served time at the Otago Corrections Facility in Milton, for a surge in local crime in the Clutha District.
[12] In 2022, Cadogan served as chair of the lower South Island councils that lobbied against the Sixth Labour Government's proposed $100 million worth of cuts to the original design of the Dunedin Hospital redevelopment.
Cadogan organised a gathering of politicians, clinicians and professionals involved in the hospital rebuild to initiate discussions on a campaign over the proposed cuts.
[14] In July 2024, Cadogan told the Otago Daily Times newspaper that he had experienced four cardiac events in the eight-month period between October 2023 and April 2024, related to his diabetes.
[16] In September 2024, Cadogan voiced opposition to Te Whatu Ora's (Health New Zealand) proposed cuts to the Dunedin Hospital rebuild.
[18] In August 2024, Cadogan opposed the Sixth National Government's efforts to reintroduce boot camps for youth offenders, citing the failure of borstal programmes during the 1960s and 1970s.