What's really wrong with that? The government already has the systems in place to collect tax so it sounds more efficient than trying to do it privately. In my

What's really wrong with that? The government already has the systems in place to collect tax so it sounds more efficient than trying to do it privately. In my country the tax system is also used to collect student loan repayments even though it's not tax, but it probably saves on administrative costs that way. Sure, student loans are also the government, not a private organization, but maybe it could be opened up to businesses as a way to collect recurring or income related payments! Imagine the accuracy of price discrimination you could achieve with access to that.