Financial Secretary Henry Tang Ying-yen yesterday rejected calls from lawmakers to change the current system for sharing investment income from the Exchange Fund. Despite the proposal being passed in the legislature, Mr Tang said with government revenue increasing through profits and salaries taxes, due to an improving economy, it would be unreasonable to review the system. Such a move could affect the fund's ability to maintain financial stability. The non-binding motion was brought by legislator Sin Chung-kai of the Democratic Party, who offered two proposals. The government could set a fixed annual transfer of $30 billion from the fund's investment return to government coffers, or there could be a fixed transfer ratio of up to 70 per cent of the fund's return.