Running a country costs a lot of money. Civil administration, police and military forces are expensive; so are roads, health and legal services. So as far back as records exist, governments have paid for it all by taxes. In most countries, almost everything is taxed: from income tax to death duty, from tax on products and services to tax on business profits and investments. So, Paul instructs the believers, who live at the heart of the Roman Empire, to pay their taxes with a good conscience.