Basically, be a bootlicker to the government the entire game. Don't do anything EZIC tells you to do throughout. If they give you any notes, just ignore them, if they ask for it back (i.e. the Corman Drex note), it won't count, as you are required to return the notes and code letters they give you. Just don't engage. Don't assassinate anyone, don't let their agents through, don't sabotage government operations per their request. Also, let the diplomatic envoy through who has insufficient papers, per Dimitri's orders, or you will be arrested and unlock ending 12.