If government departments share data they are, we are told ‘more efficient’. They also invade privacy more efficiently. Clearly there needs to be a balance: one would hope that this could be settled rationally and democratically, in an informed manner. After all, we pay over six hundred people in the House of Commons alone to think about this sort of thing.
Of course, since they don’t do that, we’d better let the House of Lords do it instead. And after that, perhaps, the Courts.