We might have enlarged safety nets — by having unemployment insurance cover part-time work, by giving transition assistance to move to new jobs in new locations, by creating insurance for communities that lost a major employer. And we could have made Medicare available to anyone.

Big companies could have been required to pay severance to American workers they let go and train them for new jobs. The minimum wage could have been pegged at half the median wage, and we could have insisted that the foreign nations we trade with do the same, so that all citizens could share in gains from trade.

We could have raised taxes on the rich and cut them for poorer Americans.

But starting in the late 1970s, and with increasing fervor over the next three decades, government did just the opposite. It deregulated and privatized. It cut spending on infrastructure as a percentage of the national economy and shifted more of the costs of public higher education to families. It shredded safety nets. (Only 27 percent of the unemployed are covered by unemployment insurance.) And it allowed companies to bust unions and threaten employees who tried to organize. Fewer than 8 percent of private-sector workers are unionized.

More generally, it stood by as big American companies became global companies with no more loyalty to the United States than a GPS satellite. Meanwhile, the top income tax rate was halved to 35 percent and many of the nation’s richest were allowed to treat their income as capital gains subject to no more than 15 percent tax. Inheritance taxes that affected only the topmost 1.5 percent of earners were sliced. Yet at the same time sales and payroll taxes — both taking a bigger chunk out of modest paychecks — were increased.

Most telling of all, Washington deregulated Wall Street while insuring it against major losses. In so doing, it allowed finance — which until then had been the servant of American industry — to become its master, demanding short-term profits over long-term growth and raking in an ever larger portion of the nation’s profits. By 2007, financial companies accounted for over 40 percent of American corporate profits and almost as great a percentage of pay, up from 10 percent during the Great Prosperity.

Some say the regressive lurch occurred because Americans lost confidence in government. But this argument has cause and effect backward. The tax revolts that thundered across America starting in the late 1970s were not so much ideological revolts against government — Americans still wanted all the government services they had before, and then some — as against paying more taxes on incomes that had stagnated. Inevitably, government services deteriorated and government deficits exploded, confirming the public’s growing cynicism about government’s doing anything right.

Some say we couldn’t have reversed the consequences of globalization and technological change. Yet the experiences of other nations, like Germany, suggest otherwise. Germany has grown faster than the United States for the last 15 years, and the gains have been more widely spread. While Americans’ average hourly pay has risen only 6 percent since 1985, adjusted for inflation, German workers’ pay has risen almost 30 percent. At the same time, the top 1 percent of German households now take home about 11 percent of all income — about the same as in 1970. And although in the last months Germany has been hit by the debt crisis of its neighbors, its unemployment is still below where it was when the financial crisis started in 2007.