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?
In every country of the world lies have a great role in the domination of politics. And in every country, politicians are more focused on increasing their own power than the interests of the people. But not all politicians are the same there are very few leaders who value truth, justice and transparency of the party. But these good politicians often fall into political fraud and media conspiracy and lose the trust of the people. People's trust in politics is decreasing because it is full of lies. Politics is mainly for the interests of people, there should be no place for lies here, if the primacy of truth cannot be ensured, then politics will never work for the real improvement of people.