They should not be corrupt and allow big corporations to dictate governmental policy.
They should not deregulate a sector that then means they need to bail that sector out like they have done with the banking industry recently
They should not torture possible terror suspects.
They should not get involved in illegal wars and lie to their population about the reasons for wars.
They should not make false election promises.
They should not act for the minority.
there are many stuff the government shoulndt do
hope it helps:)