Yup. Plus how do you prove that nothing wrong is happening to your data, if not by monitoring every single transaction? An open source software increases the risk of discovery of the whole operation. Or how do you provide all the information your political masters and their investors demand of you in the time of international crisis, if not by spying on everyone abroad? On the other hand the free software simply irritates the hell out of the sponsors who come from big software business, but you can use just the tax authorities to deal with the threat of losing them.