UNDERCOVER police who spent weeks watching and infiltrating a gang of suspected law-breakers yesterday got their men . . . a group of elderly card buffs in Victoria Park. Their work, which has cost taxpayers an estimated $20,000, led to a five-hour raid which netted four elderly male gamblers, one aged 83, and a few hundred dollars which will be used as evidence. Seventeen police also confiscated several packs of cards, a pink plastic stool which was used as a card table and stones which were tossed on a cardboard game board. Chief Inspector Henry Ho Ming-sun said it was believed that some bets within the park gambling ring reached as high as $1,000 a flutter. 'This sort of gambling is quite profitable. If we don't stop it, more undesirable characters may try to get involved,' he said. While accepting that the punters were not a particular threat to society, Mr Ho added: 'But I am concerned about education. 'There are a lot of families with kids who watch them play; it's a problem for parents.' The chairman of the Association for the Rights of the Elderly, Kwok Lit-tung, accepted that gambling was a crime but said it was also a tradition among older men many of whom had nowhere else to go. 'The Government has to keep an eye open, but they should doing more to help these people,' he said. Sixteen men and two women, aged from 44 to 69, were arrested on Sunday for gambling in the park.