Six-figure city workers fastest-growing group San Diego city employees earning at least $100,000 are the fastest-growing income group on the payroll, according to published reports. The San Diego Union-Tribune says about 13 percent of city employees exceeded the six-figure mark in 2008, allowing for salary and overtime. The figure represents an increase from 7 percent since 2005, the year Mayor Jerry Sanders was first elected. The paper added that the proportion of middle-income earners is shrinking and the lowest-paid segment isn’t growing. The shift toward higher compensation is reportedly the result of recruitment and retention issues stemming from a competitive marketplace for talented personnel.