Questions around how Mbalula had paid for his trip to Las Vegas were first raised during a twitter spat between Minister Mbalula and Adriaan Basson.
Legal frameworks need to be strengthened to stop the systematic abuse of state funds by politicians.
Two companies believe they won the same contract to provide water in the Northern Cape, leaving thirsty communities dry.
Allegations of bribery, tender-rigging and health violations follow Northern Cape bid to clean up.