1. The problem asks whether 1973 was a year of deficit due to changes in sales taxes from 1947. 2. To analyze this, we need data on sales tax rates in 1947 and 1973, and government revenue and expenditure for 1973. 3. A deficit occurs if government expenditures exceed revenues: $$\text{Deficit} = \text{Expenditures} - \text{Revenues} > 0$$ 4. Changes in sales tax rates affect revenues: if sales taxes were raised, revenues likely increased; if cut, revenues likely decreased. 5. Without specific data on tax rates and financials, we cannot definitively conclude if 1973 had a deficit caused by sales tax changes from 1947. 6. Therefore, the problem cannot be solved with the given information.