This performance audit looked at whether the Office of State Revenue was effective in collecting as much tax as it should, and at the lowest cost to the government. 
 
The Office of State Revenue (OSR) plays a crucial role in collecting revenue for NSW Government. About one-third of the money spent on services like our public schools and public hospitals is collected by OSR. This is through NSW Government taxes like stamp duty on real estate and payroll tax.

Parliamentary reference - Report number #255 - released 25 June 2015