Politician turn out to be the most humble people on earth when they are looking for power. They make all source of fake promises to solicite the support of the people but when they succeed after election they will start to see themselves like God betraying all the people that sacrifice everything to ensure they are in power.
Politicians are suppose to replicate the humility they exhibit during campaign after winning election but instead they became so rude and arrogant to their supporters.
This is the reason why we need strong institutions to hold politicians to accountable during and when they are out of office.
It is normal for them to sweet mouth the citizens about their lofty plants on how they will develop the society and other economic policies they will bring after being elected. But trust me, if there are weak institutions, like the judiciary, those in the houses of Congress and representative for checks and balances, the police etc, are not strong a enough to call the elected officials to order, definitely they will misbehave while in office.