hile DWP workers have long been some of the highest-paid in the city, salaries got even more lucrative two years ago with a five-year contract guaranteeing 16.8 percent raises and up to 28 percent depending on inflation.According to a study by Huron Consulting Group earlier this year, the total cost per full-time employee in fiscal 2007 was $142,400 a year including health care, death benefits and