The city awards many contracts to private firms to provide services to the public and to city government. Experience indicates that procurement by contract of services has all too often resulted in the payment by service contractors to their employees of wages at or slightly above the minimum required by federal and state minimum wage laws. Such minimal compensation tends to inhibit the quantity and quality of services rendered by such employees to the city and to the public. Underpaying employees in this way fosters high turnover, absenteeism and lackluster performance. Conversely, adequate compensation promotes amelioration of these undesirable conditions. Through this section, the city intends to require service contractors to provide a minimum level of compensation that will improve the level of services rendered to and for the city.