More than 1 million people across the country earn paychecks of $500,000 or higher, according to a report that analyzed payroll records on millions of salaries paid over the course of a year. The study titled “High-paying jobs? They’re a dime a dozen,” which was done by ADP, a leading management company that provides payroll and other services, concluded that “a substantial number of professionals found in every major metro” earn more than half a million dollars annually.