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Cosatu has pledged its support for plans by the Public Service Commission to prohibit public servants from doing business with government.
Spokesperson, Patrick Craven, says public servants must choose either to serve the public or to go into private business.
He says the same rule must apply to elected public political leaders at municipal, provincial and national level.
The Public Service Commission reports that financial misconduct in government has gone up from R346m in the 2009/2010 financial year to R932m in the 2010/2011 financial year.
Commission director-general Richard Levin reportedly told a Parliamentary portfolio committee this week that corruption would hit the R2b mark.
