Telling lies are kind of occupation for politician and people know that. But still some people support those politician for they are own benefit and so that day good get facility when their leader won the election. But people really don't believe politician as well as what they promises. And that's why they "buy over media, tv channels empires to sell lies and propaganda among public" cause public don't know about these facts behind the news and they trust news. And this is how politician if there work continued
To be fair, being a liar is not actually 100% part of being within the world of politics, lies are only used when the politician finds himself to be cornered inside his own rethoric and cannot longer use his usual discourse to get himself out a situation which puts him in a position of disadvantsge in the eyes of the public and in the eyes of his political rivals. It is the classic move by bad politicians. They prefer to continue to hold onto power as long as possible, instead of admitting they committed a mistake as human beings they are. Sometimes I even believe they want the rest of the world to forget politicians are human beings like anyone of us so they can screw things up.
In conclusion, the less lies a politician needs to resort to, the better quality that person is to administer resources and solve problems of the people of the republic.