AN offer of extra cash for Vietnamese boat people to return home was not enough ''on its own'' to change attitudes, legislator Christine Loh Kung-wai said after a visit to the Whitehead camp yesterday. The detainees at Hong Kong's largest camp yesterday divided themselves into two categories - economic migrants and genuine asylum seekers - as they called for a comprehensive information package on their home country. The 24,000 boat people have rejected an offer by the British Government of an extra US$150 (HK$1,150) each for volunteering to return home, in what Ms Loh said could be a move aimed at holding out for further incentives. The Government refused to say whether other efforts would be made to boost dwindling Vietnamese departures. Ms Loh met about 50 inmates at the camp where she said the message was clear that the cash incentive was not enough on its own to change people's attitudes. ''They acknowledged that some people were economic migrants, but even these wanted more than just the cash. They want to know more about the situation in Vietnam,'' she said. ''The other group is made up of those who say they have been persecuted in Vietnam and have genuine fears of persecution upon their return. ''They didn't give me a breakdown of the two groups and I think some people know only in their own mind which category they truly fall into.'' She said the overwhelming response was that more information was needed on conditions in Vietnam. ''Every person has different questions, and that demand can only be met by providing a wider range of material to deal with individual needs. ''For those concerned about persecution upon their return, I emphasised that work would have to be done at a government-to-government level to obtain airtight assurances,'' Ms Loh said. Ms Loh also expressed concerns that there were unlikely to be any charges made against security forces involved in the controversial raid at Whitehead in April.