Norway’s relative frugality stands in stark contrast to Britain, which spent most of its North Sea oil revenue  and more  during the boom years. Government spending rose to 47 percent of G.D.P., from 42 percent in 2003. By comparison, public spending in Norway fell to 40 percent from 48 percent of G.D.P.

“The U.S. and the U.K. have no sense of guilt,” said Anders Aslund, an expert on Scandinavia at the Peterson Institute for International Economics in Washington. “But in Norway, there is instead a sense of virtue. If you are given a lot, you have a responsibility.”

Eirik Wekre, an economist who writes thrillers in his spare time, describes Norwegians’ feelings about debt this way: “We cannot spend this money now; it would be stealing from future generations.”

Image Friends meeting in an Oslo nightspot. Norways economy grew 3 percent last year as many nations plunged into a recession. Credit... Espen Rasmussen for The New York Times

Mr. Wekre, who paid for his house and car with cash, attributes this broad consensus to as the country’s iconoclasm. “The strongest man is he who stands alone in the world,” he said, quoting Norwegian playwright Henrik Ibsen.

Still, even Ibsen might concede that it is easier to stand alone when your nation has benefited from oil reserves that make it the third-largest exporter in the world. The money flowing from that black gold since the early 1970s has prompted even the flintiest of Norwegians to relax and enjoy their good fortune. The country’s G.D.P. per person is $52,000, behind only Luxembourg among industrial democracies.

As in much of the rest of the world home prices have soared here, tripling this decade. But there has been no real estate crash in Norway because there were few mortgage lending excesses. After a 15 percent correction, prices are again on the rise.