What is the primary responsibility of the Illinois Comptroller?

The primary responsibility of the Illinois Comptroller is to manage state funds. This role encompasses overseeing the financial management of the state government, ensuring that funds are properly allocated and spent in accordance with state laws and regulations. The Comptroller is tasked with maintaining the state's accounting records, processing payments and disbursements, and providing financial reports. By managing state funds effectively, the Comptroller plays a crucial role in promoting financial transparency and accountability within the state government.

The other options reflect duties associated with different state offices or agencies. Setting state education policy is typically within the jurisdiction of the Illinois State Board of Education. Overseeing transportation systems is generally the role of the Illinois Department of Transportation, and issuing driver's licenses falls under the Secretary of State's office. Each of these responsibilities is distinct and does not fall under the purview of the Comptroller.