Michael Meacher proposed on Labour Home that British cabinet ministers should have to face select committees in the House of Commons for confirmation hearings just like Americans have to face Congressional Hearings in the United States. Its an interesting idea and definitely deserves some consideration- not a matter on which I wish to make a decision myself right now.
What is true is that it would alter completely the character of a cabinet minister in the UK. Detailed hearings like in the US would demand that ministers had detailed knowledge of what they were to become ministers of before they entered the government. The United States recruits men and women like Condoleeza Rice who have trained for years in a particular field- instead of as we do recruiting skilled amateurs who rely on civil service professionals to elucidate the detail. Confirmation hearings would begin a very different relationship between the politician and that he was minister of.
It might also change the role of Parliament- independence becoming more and more prized over the kind of dependance that makes scrutiny dangerous to one's future career. Parliament could become a route to committee chairships, as well as cabinet office.
Its an interesting suggestion from Meacher and definitely one worth considering, even if he fails to attain the Labour leadership- I am as yet not convinced either way- this would bring a great change in the qualities we expect from ministers and Parliament.