It's very child-like in nature to believe humans are incorruptable.

It is, and yet these very same people often think that all people are so corruptible that they need a nanny state to control them. They seem to think that once a corruptible person gets a government job, or a doctor's "license" or similar, that magic fairy dust is sprinkled on them and they are forevermore no longer corruptible. Until, of course, they get fired for stepping out of line, in which case they are back to being corruptible.

It is not just child-like, it is childish and juvenile.