He called all of them the elite, and always tried to make the people develop hate towards them and their supporters.

It’s always hard to believe about the manipulative way people are using to get what they want. At the end the people get fooled. When they realize they actually got fooled, in most cases, it’s already too late. By changing the constitution, all they want to do is to enforce their position especially Chavez. If their future is threatened just a bit, they make sure it’s not a thread anymore, because they are frightening just to think about loosing their power. Just like you mentioned:

If a government wants to change the constitution, it might because they know the current one doesn’t work for them, and it doesn’t work for them