After Tax Bills, Congress Faces The Long Haul
House and Senate, beginning work on compromises with each other and Pres Clinton on budget and tax bills to balance budget in 2002, face bigger challenge of keeping budget balanced decade later; experts are concerned that Congress lacks courage to face long-term problem of planned tax cuts mushrooming at same time that baby boomers retire; Sen Pete V Domenici and Rep Bill Archer, budget committee heads, express optimism; photos (M)
