What is said about the main downfall of Senator Zapanta in trying to keep his stolen money protected from others?

It is said that Senator Zapanta's main mistake was in underestimating poor people within his employ. Jose Angelico had served as Senator Zapanta's houseboy and was given access to nearly every piece of information within the senator's house, including the combination to the senator's safe. Senator Zapanta's certainty that Jose Angelico would not and could not go up against him acted as his ultimate downfall. He overestimated the extent of his power.