So what about the argument that governments have profited from the support they gave to banks during the crisis?

That's an argument that is often heard nowadays.

Ignoring the fact that, in several countries, banks were simply subsidised by their governments in one way or another, here is at least one view from the UK, where its Public Accounts Committee says banks did not pay enough:
http://link.ft.com/r/P75VYY/9Z0L60/KTN4/D4VWC8/C5CILO/MQ/t?a1=2011&a2=4&a3=20 Sphere: Related Content