In this regard,I see it very necessary for christians to involve in politics, because it will go a long way in bringing law and order,peace and stability, the Bible said if the ringtous rule the people rejoice.
The reason why the system is corrupted and polluted is because christian had term politics to be a dirty game also, with the fear of the unknown that if the get there they will also join them,but to me I say that ideology is a false, because there are still christians in the politics and still maintain their standard.
It's important for christians to participate in politics,so as to also be among the policy makers,to make policy's that have the interest of the body of Christ in it, because if they are not there all the policy would be made and wether it's for there interest or not they can do anything.
So I  SUPPORT the christians to join politics, because God is the creator of all systems and he will back anyone who go and maintain its believe system and in standard of his faith.