I think you mean that politicians in smaller countries are more susceptible to public opinion because - the politician lives necessarily close the majority of

I think you mean that politicians in smaller countries are more susceptible to public opinion because - the politician lives necessarily close the majority of the people and his personal safety (and that of his family) is in danger if he blatantly disrespects the will of the people - people can more easily "vote with their feet" because they just need to move a few dozen miles away to live in another legislation which enables them to keep most of their social network.