The phrase "to reform the system" means to make changes or improvements to an existing structure or process in order to make it better, fairer, or more efficient. Full definition
What I would say is this makes the case for reforming the system of party funding in this country even stronger. (itv.com)
The act will reform the systems for adoption, looked - after children, family justice and special educational needs. (gov.uk)
As scientists, analysts, and policymakers, we must treat the data — and the lack thereof — with care as we work to reform the system so that it serves everyone. (sciencemag.org)