TAXI driver Ng Kwok-hung, one of the tens of thousands of self-employed who will have to pay both the employer's and employee's contributions, wants his future pension doubled too. Mr Ng, 55, who owns his vehicle, said the scheme discriminated against the self-employed. With an income of up to $10,000 a month, Mr Ng may have to contribute $300 a month to the pension pool. While he agrees it is fair for each individual in the community to contribute, he argues that if he is to contribute twice the employee's amount, he should get twice the pension in return. ''The logic is simple. I should be rewarded proportionally for what I have paid. Why should we pay more and get less just because we are our own bosses? I am really puzzled,'' said Mr Ng. He said the self-employed were not being selfish. ''I think we need to have a clear definition of self-employed people. ''I do not enjoy benefits most employees do, say, paid annual holidays, double pay at year's end, overtime payment, or medical benefits,'' said Mr Ng, who works 16 hours a day. ''From this point of view, whether I can be classified as an employee is in doubt.'' He also said the Government should define income. ''For example, a taxi driver may make as little as $400 a day if he only works an eight-hour shift or if he is unlucky and does not have many fares. ''This may affect his monthly income greatly. So how much am I supposed to contribute?'' Mr Ng, who lives in Wan Chai with his wife and three sons, said the scheme was particularly unfair to people planning to leave Hong Kong. He also feared it would exert a heavy financial burden on the Government, and thus lead to heavier taxes. Nonetheless, he plans to retire in 10 years' time and enjoy his ''free lunch''. Driver and owner Leung Tat-chiu supported Mr Ng's suggestion to have double pension payments for the self-employed. He said it was also unclear whether a driver who rented a vehicle from another person should be considered an employee, and the owner of the car should be considered the employer and made to pay 1.5 per cent. Latest figures from the Census and Statistics Department show there are about 134,600 people classified as self-employed - people over 15 who own a company under their name or operate a business on their own. Of those, 15,300 are hawkers. There are 14,600 taxi owners, and Mr Ng said the pension issue was a matter of great concern to them.