 During the run up to the 2010 general election, Caine publicly endorsed the Conservative Party and appeared with then-party leader David Cameron for the launch of a civilian non-compulsory "National Service" for sixteen-year-olds, although Caine stated he had previously supported New Labour under the leadership of Tony Blair in 1997.In July 2014, Caine was reported to have been a celebrity investor in a tax avoidance scheme called Liberty.In November 2014, Caine described the proposed mansion tax by then Labour leader Ed Miliband as "preposterous and silly."