The bank bonus season, that annual rite of big money and bigger egos, begins in earnest this week, and it looks as if it will be one of the largest and most controversial blowouts the industry has ever seen. Bank executives are grappling with a question that exasperates, even infuriates, many recession-weary Americans: Just how big should their paydays be? Despite calls for restraint from Washington and a chafed public, resurgent banks are preparing to pay out bonuses that rival those of the boom years. The haul, in cash and stock, will run into many billions of dollars. .