No matter if you're the president of the United States, mayor of a small town, or the big sister of 4 younger siblings you should always lead by a personal example. If you hold a position where there are people underneath you, you need to always make sure you are leading in the right direction.
If high government officials work without caring for the people, then they are working for themselves and are bound to make selfish/ignorant choices. For example, a high government official forgets to humble his or herself, they may make a decision that could cost them their job. Either they could scam a way for more money, or have a scandalous affair that leaks out to the people.
Overall, anyone who is leading anyone needs to make good choices because every move they make is looked at and may or may not be followed.
When it comes to government officials, the people need to be able to trust that their country is being ran by trustworthy and humble people.