Those tax-based expenditures can account for tens of billions of dollars. What we noted in the report, and the government made some improvements to the reporting of those tax expenditures, is that even though they are not reported in the estimates, there is a tax expenditure report published every year. There is, then, some sort of reporting back and transparency with regard to the tax expenditures, but they are not included as statutory spending in the main estimates.
On May 10th, 2016. See this statement in context.