They enable comparisons with the past and set a benchmark for the future. They allow comparisons with other countries. They are the key to effective policymaking. Good statistics ensure a country is well placed to make the best case for itself on the international stage. They are crucial for firms considering investment in a country, and for international organisations making decisions on development programmes.
Economic policy relies on official statistics.
Government needs statistics to 'balance its books' to ensure it raises enough money from taxes to pay for all its plans. Official statistics are essential in indicating those people and regions in greatest need, and best use of scarce resources in improving health, education etc. Businesses make vital decisions on levels of investment and employment on the evidence of economic data. Individual citizens can benefit from statistics in making important decisions about their lives where to live and work, the best schools for their children, how to manage their money etc. Few would dispute that a healthy business sector is a major attribute for any country or that an informed citizen is a better citizen.