That is the main reason why people welcome them openly in public. Because of their good rapport and connection with public they get respect everywhere.
Knowledge is power.
The other practical reason is these people do gimmicks and use a fraction of their tainted dealing with innocent and naive people in a camouflaged way. The people will think that he is a kind and compassionate person without getting to know the truth.
So, the next time you see a leader so well received on the dais with a huge crowd chanting non-stop, the chances of this being a 'paid service' is more likely than genuine supporters.
If you have some time, you can read this article.