THE Director of Audit should investigate the Hong Kong Stadium controversy, legislator Cheung Man-kwong said yesterday. He asked whether the taxpayer should be expected to contribute any more money for such a ''white elephant'' which was not suitable for pop concerts and was too expensive for sports events. ''Both the Hong Kong University of Science and Technology and the stadium are the joint product of the Jockey Club and the Government, and they all end up in a mess,'' Mr Cheung said at yesterday's Legislative Council meeting. He asked how much Hong Kong people would have to pay before the Government woke up to the fact that they should be careful with the club's donations. He said the Director of Audit should look at why there was no noise pollution assessment and why $175 million was needed to fit out the stadium. Legislator Fred Li Wah-ming said he supported Mr Cheung's suggestion but the director could not do much about the maladministration involved. Urban Councillor Wong Siu-yee said the problem should be handled by the ombudsman. The problem lay in whether the Secretary for Recreation and Culture had the power to force the council to adopt commercial principles in running the stadium and if its decision was suitable, said Mr Wong.