Aren't MPs are responsible for talking to potential contractors about the non-specifics of any contract. That is to say that they receive indirect favours from

Aren't MPs are responsible for talking to potential contractors about the non-specifics of any contract. That is to say that they receive indirect favours from a number of potential contractors, and then decide on which contractor provided the best schmooze. If there is a draw between contractors then whoever went to Eton with you shall win. If both contractors went to Eton, then whoever fagged for the other, automatically loses.