Wis. Stat. § 13.61: Lobbying regulated; legislative purpose.

The legislature declares that the operation of an open and responsible government requires that the fullest opportunity be afforded to the people to petition their government for the redress of grievances and to express freely to any officials of the executive or legislative branch their opinions on legislation, on pending administrative rules and other policy decisions by administrative agencies, and on current issues. Essential to the continued functioning of an open government is the preservation of the integrity of the governmental decision-making process. In order to preserve and maintain the integrity of the process, the legislature determines that it is necessary to regulate and publicly disclose the identity, expenditures and activities of persons who hire others or are hired to engage in efforts to influence actions of the legislative and executive branches.