The nonpartisan Government Accountability Office looked into the Wage and Hour Division. Wage and Hour is the division of the Department of Labor that investigates violations of the Fair Labor Standards Act. When your employer fails to pay you your wages, you can file a claim with Wage and Hour Division. Unofrtumnately, GAO found wage and Hour provides very poor service.
GAO had fictitious employers and employees call Wage and Hour with various questions. They found Wage and Hour provides inaccurate information, it discourages wage claimants from filing a claim and even ignored a fictitious report of child labor at a meat packing plant. See the complete GAO report here. Read Chris McKinney's take on the report here. As Chris says, you may be better off filing a lawsuit with an employment lawyer than relying on Wage and Hour Division.