Strange Bedfellows
There is an Australian film from 2004 called Strange Bedfellows which stars Paul Hogan. The premise is that an Australian man is having tax troubles when a new tax is passed which gives gay partners tax rebates. So he and his best friend pretend to be in a homosexual partnership to gain these rebates. Inevitably a tax inspector comes to visit to confirm this and meanwhile the people of the small town overhear things and think that the duo really are gay. Oh yeah, and the two of them are involved in fire-fighting.
Sounds very familiar!
Link: http://www.imdb.com/title/tt0360032/