THE CONTROL OF MONEY 167 other documents which require a stamp to make them legal; they give some indication of the volume of business being done in the country. The National Defence Contribution was first introduced in 1937: its purpose is to make businesses, whose profits are rising, contribute to the cost of armaments. Customs Duties are paid on imported articles, and Excise on goods and services produced at home. This indirect taxation fills on all classes, but naturally, makes a bigger proportionate hole in the pocket of the poorer man. If everyone paid direct taxes, the number of forms to be filled up and enquiries to be made would be enormous; and if all taxation were indirect, it would have to fall on a great many articles, so that the problems of collection and supervision would be formidable. The British system therefore aims at collecting large sums by direct taxation of the limited number of rich and middle-class people; the rest of the mtion are drawn into the net by indirect taxation, the bulk of which comes from duties laid on a few articles of widespread consumption. So everyone becomes a taxpayer ;x indeed, -a married man with three children, earning £100 a year, has to pay about one-ninth of his income, one earning £500 about one-fourteenth, and one earning £1,000 about one-sixth. Estimated Expenditure for 1938-1939. Interest and Management of National Debt . 230,000,000 Other Consolidated Fund Services . . 12,100,000 TOTAL CONSOLIDATED FUND SERVICES . , 242,100,000 Supply Services :— Defence:— Army...... 77,373,000 Navy . . . . . 83,810,000 Air Force..... 72,976,000 Pensions for Armed Forces . . . 19,089,000 TOTAL DEFENCE . . . . . . 253,248,000