Sentence:  Economically, too, London is startlingly different. The capital, unlike the country as a whole, has no budget <WSD>deficit</WSD>: London's public spending matches the taxes paid in the city. The average Londoner contributes 70 percent more to Britain's national income than people in the rest of the country. 
Meaning of the word marked with <WSD> tags:  A situation wherein, or amount whereby, spending exceeds government revenue.