"Reform" is a set of large changes to a system, such as in government or an industry. When an idea for reforming something becomes popular among a group of people, it is given a name in the form of "___ reform". For example:

• education reform - changing the education system of a country or region
• campaign finance reform - changing the system of how political candidates raise money for their campaigns
• tax reform - changing the system of how taxes are charged or collected