Some federal workers who are not being paid during the government shutdown have a nagging fear: They might not receive retroactive pay once the impasse is resolved. Roughly 1.4 million federal employees  whose wages are being withheld during the government shutdown are  hunkering down  and cutting all nonessential spending, as they missed their first full paychecks on Friday.  Here's what to know about retroactive pay for those workers when the shutdown ends.  Do all federal workers get back