The eight-party grouping in Legco will be adversely affected if two major parties share power with the Government after the ministerial system is set up, according to Liberal Party chief James Tien Pei-chun.
Mr Tien, who convenes the grouping of almost 50 legislators, and Tsang Yok-sing, of the Democratic Alliance for the Betterment of Hong Kong, are tipped to become 'ministers without portfolio' in the Executive Council when the accountability system is introduced in July.
The two parties' representatives would encourage support from party colleagues on government policies and bills while giving direct input from their parties to policy-making in Exco.
But Mr Tien said the eight-party grouping would be mired in uncertainty if Exco were open to party representatives. 'There will be a coalition of government parties and a coalition of opposition parties. The eight-party consensus will be adversely affected,' he said.
The grouping put forward joint proposals on relief measures including exemption of rates payments and freezing of government fees and charges before Financial Secretary Antony Leung Kam-chung finalised the Budget.
Mr Tien told the South China Morning Post he had discussed with key party colleagues the idea of a ruling coalition between major 'friendly' political groupings and the Government.