Lobbyists for the oil and mining industries have primarily focused on bringing about deregulation in their industries, particularly regarding environmental and worker safety regulations. This often involves pushing for reduced regulatory burdens, which they argue can enhance economic growth and job creation. They may advocate for legislation that simplifies compliance or weakens standards intended to protect the environment and workers' health and safety.
The other options you've mentioned, such as compensation for retired or disabled employees, a higher minimum wage, and greater protection for employees affected by civil rights issues, are less typically associated with the lobbying efforts of these industries. These issues are often addressed more by labor unions, employee advocacy groups, and broader social movements rather than specific lobbying from oil and mining interests.
In summary, the most significant changes brought about by lobbyists in the oil and mining industries have been related to deregulation efforts.