Wis. Stat. § 62.57
The common council of a 1st class city may at any regular or special meeting adopt a uniform and comprehensive salary or wage ordinance, or both, based on a classification of officers, employments and positions in the city service, whether previously so classified or not, if provision has been made in the budget of the current year for the total sum of money required for the payment of the salaries and wages and a tax levied to fund the wages and salaries. Wages under this section may be fixed by resolution. The common council may, at any time, determine a cost-of-living increment or deduction, to be paid in addition to wages or salaries under this section, based on a proper finding of the United States bureau of labor statistics. The common council may provide for overtime pay and compensatory time under s. 103.025 for employees who work in excess of 40 hours per week.
Wis. Stat. § 62.57