Hong Kong has retained its position as the world’s freest economy, but the think tank responsible for the listings said that was likely to change in the future, with the integrity of the city’s legal system in doubt.The Fraser Institute ranked Hong Kong at No 1 on the list for the 30th year running, just ahead of Singapore, but scores for the legal system slumped to their worst level in 20 years, and judicial independence was ranked at its lowest place in 16 years.Fred McMahon, the Canadian…