After becoming chairman of the South Coast Cooperative Dairy Association, he was elected to the
Albert Shire Council in the early 1950s, serving as shire chairman for nine years from 1958 to 1967. In 1966, Hinze entered the State political arena as the member for
South Coast, representing the then
Country Party. After eight years as a
backbench member of the
Coalition Government, he was promoted to Cabinet. In 1971, while still a backbencher, he was part of a plot within the Country Party parliamentary wing to topple
Joh Bjelke-Petersen that failed only when Bjelke-Petersen broke a tie in the party-room meeting by voting for himself. Between 1974 and 1987, he served as the Minister for Local Government and Main Roads. Between 1980 and 1987, he served as the Minister for Racing. Between 1980 and 1982, he served as the Minister for Police. These ministerial positions earned him the commonly known title of 'Minister for Everything'. In May 1988, Hinze resigned from Queensland Parliament after allegations were made against him during the
Fitzgerald Inquiry, which was investigating corruption in Queensland during the Bjelke-Petersen era. ==Later life==