Depending on how bad the government wants the data, that's essentially just charging a high premium to get all the data instead of a specific user's data.

If the purchasing party is less scrupulous, you've thwarted nothing. In extreme cases (or for smaller companies), the purchaser could even be a government front.

I'm pretty sure there are known entities offshore you could sell to who are unlikely to be government fronts. Imagine selling to someone Wikileaks affiliated...