You can indeed. The figures are very large and you cannot view item level detail in the financials, only general concepts. The NSA may be propping up the Azure division or one of countless others through backroom deals over this type of thing.
In addition to selling extra-high priced items to NSA/Military/Government, the Government could allow the company tax breaks it wouldn't get otherwise.
Tax rules for a company of the size of Microsoft are not simple. It's not impossible to hide stuff.
