and eventually those tax reports and credit ratings will be tied to super market checkout systems. So governments can pick and choose which tax payers can eat what.
Any data that is aggregated is open to abuse by the aggregator and it will be definitely abused if the aggregator is a government body.
Why do you have to bring FB into the equation? It seems you are mentioning it as a relevant alternative - what is that?
When somebody says "This may be controversial // Well, much better than being crushed under a rock", the latter is supposed to be rhetoric, here somebody seems to treat it like a real alternative, as if you went into the current events to avoid that!
Any data that is aggregated is open to abuse by the aggregator and it will be definitely abused if the aggregator is a government body.