The first way was to send more women into paid work. Most women streamed into the work force in the 1970s less because new professional opportunities opened up to them than because they had to prop up family incomes. The percentage of American working mothers with school-age children has almost doubled since 1970  to more than 70 percent. But there’s a limit to how many mothers can maintain paying jobs.

Image Credit... Oliver Munday

So Americans turned to a second way of spending beyond their hourly wages. They worked more hours. The typical American now works more each year than he or she did three decades ago. Americans became veritable workaholics, putting in 350 more hours a year than the average European, more even than the notoriously industrious Japanese.

But there’s also a limit to how many hours Americans can put into work, so Americans turned to a third way of spending beyond their wages. They began to borrow. With housing prices rising briskly through the 1990s and even faster from 2002 to 2006, they turned their homes into piggy banks by refinancing home mortgages and taking out home-equity loans. But this third strategy also had a built-in limit. With the bursting of the housing bubble, the piggy banks are closing.

The binge seems to be over. We’re finally reaping the whirlwind of widening inequality and ever more concentrated wealth.

The only way to keep the economy going over the long run is to increase the wages of the bottom two-thirds of Americans. The answer is not to protect jobs through trade protection. That would only drive up the prices of everything purchased from abroad. Most routine jobs are being automated anyway.

A larger earned-income tax credit, financed by a higher marginal income tax on top earners, is required. The tax credit functions like a reverse income tax. Enlarging it would mean giving workers at the bottom a bigger wage supplement, as well as phasing it out at a higher wage. The current supplement for a worker with two children who earns up to $16,000 a year is about $5,000. That amount declines as earnings increase and is eliminated at about $38,000. It should be increased to, say, $8,000 at the low end and phased out at an income of $46,000.

We also need stronger unions, especially in the local service sector that’s sheltered from global competition. Employees should be able to form a union without the current protracted certification process that gives employers too much opportunity to intimidate or coerce them. Workers should be able to decide whether to form a union with a simple majority vote.