Politics is called a dirty game just because all the politicians are very much experienced in playing a blame game. They are always ready to point a finger over other whereas, they are not willing to see themselves or their faults. Almost every politician has been involved now and then in some type of criminal activities. In spite of that, being inside the jail, they use their power and money and influence all the proofs and eye-witnesses and live a good life.
If any politician is doing some good work then also, he would have been victimized of being very good and doing a selfish work to attract the voters in his favor. It is just that if you are bad then you know you are bad, but if you are trying to do something good then also you have been judged that it would be a selfish motive.
Politicians play the blame game at such an extent that they don't even think twice before blaming the government for any natural calamity or accident. All these things are not in the hands of any person particular, then also the government or the specific politicians has been blamed.