Why do we always vote for goons?

Whether it's BJP Or Congress, the majority of their candidates are goons or corrupt people. We have never heard of a local Doctor turned to politics, we never heard of a Railway motorman becoming a politician. If you want to become a politician you have to become a goon first if you are middle or lower middle class Or if you have money you can do blood campaigns, job vacancy campaigns etc to lure people into voting for you. People think they can fix the govt from top down ie. resignations and amendment to bills etc but that will lead to anarchy if you want change or worse we will let other country's intelligence agency infiltrate us. The place where we can make change ie. our opportunity to vote is being wasted for the goons we vote for.