THREE witnesses in the Gilbert Leung corruption case have vowed not to quit, as they prepare for a week of increasing calls to step down. ''Our consciences are clear,'' the trio told the Sunday Morning Post, ahead of Tuesday's crucial Regional Council debate on the issue. One said the money Leung gave him was a salary, which he used to buy a second-hand car, while another insisted he still planned to return the $30,000 that the ICAC found in his home. Regional Councillor Fung Pak-tai, Sha Tin District Board member Wai Hon-leung and North District Board member Ko Kim-ching insist they are innocent, despite giving evidence under immunity from prosecution at the bribery trial that ended with Leung being jailed for three years. But United Democrats Regional Councillor Johnston Wong Hong-chung charged they had damaged the reputation of the council, and will move on Tuesday that the government change the law to force all connected with the bribery case to step down. Student leaders are also pushing for resignations, and will today meet Mr Wai, to call on him to explain his actions. ''If they are responsible to the public, they should resign,'' said Hongkong Federation of Students spokesman Tsang Kwok-fung. But the trio hit back, claiming the criticism was unfair. ''Gilbert never told me to bribe other councillors for votes. I am only his adviser, instructing him on how to deal with the press and other councillors,'' said Mr Wai. ''I view the money he gave me two months after the election as something like a salary because I contributed my knowledge.'' Although Mr Wai admitted in court that he accepted $150,000 from Leung, he insisted there was nothing wrong with this. ''I do not care whether or not I stay on as a District Board member, but it will be a loss for local residents if I quit,'' he said. Mr Fung, who was found with an alleged $30,000 bribe in his home, accused his critics of not caring about the law. ''I put a lot of effort into being elected, so why should I quit? Those who call on me to quit should ask the Governor whether I should resign. They have not respected the law,'' said Mr Fung, who claimed he still intended to return the money to Leung. ''I never think of myself as a tainted witness. If I were a tainted witness, then I would prefer to be charged,'' said the Cheung Chau Rural Committee chairman. Mr Fung said he would attend the forthcoming Regional Council meeting and speak out if necessary. But Mr Ko admitted he was at fault in not reporting the case to the police. ''It was an accident,'' he said. ''Gilbert came to my office and put a packet of money on my desk. I told him 'I cannot do that', but he insisted, so what can I do then, ring 999 to call the police? Would you treat your good friend in this way? ''Since it is inconvenient to keep such a large amount of money, I saved it in my account and signed a cheque back to Gilbert. All I can be blamed for is not being decisive. ''I am not greedy. I am a businessman and I always donate a lot to charity. I don't need that $100,000, in fact I have not used that sum. I do not care about this job. I am very busy in my own business, and what I want is to voice my opinion to the District Board. I am not a politician.'' Lau Hon-kit, a fourth witness in the case, was not available for comment.