58 THE BRITISH APPROACH TO POLITICS the "doctrine of collective responsibility"; it exists for the same reason as the Cabinet itself—that the policies of Departments affect one another. A First Lord of the Admiralty who pointed with pride to the size of the Navy could not fairly deny his responsibility for the taxes imposed by the Chancellor of the Exchequer. To preserve the idea of unity, the Cabinet generally refrains from settling disputed questions by a vote; it is the business of the Prime Minister, after hearing the discussion, to "take the sense of the meeting" and declare the Government's policy accordingly. A Cabinet Minister who openly opposes Government policy will be expected either to withdraw what he has said or to resign. Opponents of a Government are always on the look-out for statements by unwary Ministers which suggest that the Cabinet is not united. In 1932 the "Samuel Liberals" in the Government disagreed with the tariff policy of their colleagues. For a time an "agreement to differ" was observed—an exception to collective responsibility, allowing the Samuelites to express their disagreement on this one point. Before long, however, they withdrew from the Government; and though it was in name a Coalition of several parties, in fact it was overwhelmingly Conservative. EFFICIENCY AND POWERS OF THE CABINET. The Cabinet has been described as the link between Executive and Legislature. The custom, though not the law of the Con- stitution, requires that all its members should sit in either the Lords or Commons. Occasionally a Cabinet Minister will not be in Parliament, but when this- happens, he will be put up to fight the first by-election at which he has a chance of victory. Mr. Ramsay MacDonald continued in the Cabinet after his defeat at the 1935 Election, but returned to Parliament in 1936. Sir Henry Slesser became Solicitor-General in the first labour Government before he had ever sat in Parliament. The Chancellor of the Exchequer and the Home Secretary are always in the Commons, and it seems probable that in future this will be