STATE AID AGENCY CITY'S ONLY OPTION, PANEL MAINTAINS
NYS Gov Carey advisory panel tells NYC's chief elected officials that they have no alternative but to accept creation of state agency to help solve chronic NYC short-term debt crises, even though agency will have some voice in city's future budgetary affairs; Mayor Beame, after several days of opposition, supports plan but he fails to get City Council leadership and Estimate Bd to vote in favor of it after panel member Simon H Rifkind tells him that legislative leadership is planning changes in proposed legis; City Council Pres Paul O'Dwyer and Bronx Boro Pres Robert Abrams are leading opponents of proposed corp; Queens Boro Pres Donald R Manes, Bklyn Boro Pres Sebastian Leone, City Coucil majority leader Thomas J Cuite, Controller Harrison J Goldin, SI Boro Pres Robert T Connor and City Council Finance Com chmn Matthew J Troy Jr support Beame; Carey panel says without corp city is in danger of default in next few working days; investment banker Felix G Rohatyn, member of panel, says banking support is contingent not only on formation of corp but on segregation of revenues from sales tax, stock transfer tax and other state revenues; Goldin' office says city will be short $43-million on June 6 when it must meet $132.9-million in expenses; munic-securities dealers question whether proposed corp will be better able to sell notes and bonds than city itself (L)