It is looking like telling lies is the prerequisite of becoming a politician. As a matter of fact, there is a way you will tell lies that people will start suspecting you to be a politician. How we get to this point in human history is what no one can explain.
I don't know about your country but in my country, politicians buy over media empires to sell lies and propaganda to the public... I know this is not peculiar to my country. This may be the reason there is a growing distrust between the leaders and the followers.
But is politics supposed to really be about lies? Why is the polity dominating by propaganda?
Not only in your country but all over the world such politics have emerged, usually by funding the media that favors them. You may be surprised to hear that everything in the country where I live is unilaterally controlled by the government. Because the second or rival government is never given a chance, even if all the people of the country are agitating, this government does not mind it because all the agitations by its administration kill people, and the agitation pours hot water on the people due to which all the people are greatly affected and Something dies. I have never seen such incidents that I have seen while living in my country, when they are circulated on social media, they are deleted immediately.