President-elect Donald Trump and the Republican-controlled Congress are drawing up plans to take on the government bureaucracy they have long railed against, by eroding job protections and grinding down benefits that federal workers have received for a generation. Hiring freezes, an end to automatic raises, a green light to fire poor performers, a ban on union business on the government’s dime and less generous pensions — these are the contours of the blueprint emerging under Republican control of Washington in January.