Fixed-term Parliaments Bill

My hon. Friend is making some very good points about Governments hanging on for five years, but is not the crucial point that if all precedent and practice in this country are for four-year Governments, and four-year terms for other directly elected positions, the Government need to advance a strong case for extending the period to five years? They simply have not done that; indeed they refuse to do so. Is that not what we should consider today?