ANNOYED by the Sino-British squabble, most residents probably share the New Year wish that 1993 would usher in a more harmonious social climate. However, a realistic survey of the horizons would find that the year ahead is still filled with political landmines. The Government will soon find itself under mounting pressure for tax concessions as the Financial Secretary, Mr Hamish Macleod, starts drafting his second Budget. In a desperate effort to resc But the approved amount can only keep the authority afloat until the middle of this year. Officials are keepin Councillor Hui Yin-fat has already moved a motion debate for February on the proposed scheme for a compulsory retirement fund. Forty-three legislators have signed a petit