Seems morally dubious from every angle:
- paying way less for what it is when you sell it to "governments", a hefty fee for a black market loop whole to sell your hacks
- is any government hacking people (either citizens or foreign nationals) a good thing?
- hunting "bad guys" is always the image put forth, but never the whole image
Breaking tor anonymity isn't awfully hard - you just need lots of nodes and some luck.
Governments really want to break the encryption and see the actual contents of connections, which is why they typically prefer exploits to tor endpoints.