Passage: As the war drew to an end, he searched for a seat to fight at the impending general election. He was selected for the constituency of Ormskirk, then held by Stephen King-Hall. Wilson agreed to be adopted as the candidate immediately rather than delay until the election was called, and was therefore compelled to resign from his position in the Civil Service. He served as Praelector in Economics at University College between his resignation and his election to the House of Commons. He also used this time to write A New Deal for Coal, which used his wartime experience to argue for nationalisation of the coal mines on the grounds of the improved efficiency he predicted would ensue.

Question: How did Wilson think the coal mines would benefit from nationalisation?
improved efficiency