An Illinois-based company that represents those with disabilities in dealings with government programs has announced it is laying off 90 of its roughly 600 workers.  The Belleville News-Democrat reports Belleville-based Allsup Incorporated announced the job cuts yesterday.  The privately-held company says in a statement it “is making necessary changes in its business so it may adapt to continued trends within the Social Security disability program and other factors.”  30-year old Allsup provides assistance to those seeking Social Security and veterans disability benefits, as well as Medicare services.