How do government corporations differ from independent executive agencies?

Government corporations are entities created by Congress to provide specific services that are often similar to those offered by the private sector, such as the United States Postal Service. They operate with greater flexibility than traditional government agencies and can generate their own revenue. In contrast, independent executive agencies, like the Environmental Protection Agency, are established to oversee specific areas of public policy and are primarily funded through congressional appropriations. While both types of organizations operate independently from presidential control, government corporations focus on service delivery, while independent agencies focus on regulation and policy implementation.