With regard to the correspondence by the Government Employees Pension Fund in November 2022 informing its members who intended to retire in November or thereafter that they would not receive their full pension payments, and in light of the complaint received from a retiree (details furnished) that despite applying for her pension before November and not receiving any letter she did not receive her full pension, (a) what informed the retroactive application of the November correspondence and (b) how many individuals were affected by such retroactive application?