How can a government with party associations ever effectively represent the people it's designed to serve?

Truly, whether 2 parties or 10, how can a goverment work effectively for it's people when elected officials vote with their party?

My question is why should parties or any such associations among elected officials not be abolished?
Update: Thinking more on this, when I go to the voting booth, I vote in private. There was a big Union issue which surfaced last week about secret voting. There's no peer pressure.
6 answers 6