On the other hand, what's the worth to society of social workers who put in long and difficult hours dealing with patients suffering from mental illness or substance abuse? Probably higher than their average pay of $18.14 an hour, which translates into less than $38,000 a year.
How much does society gain from personal-care aides who assist the elderly, convalescents, and persons with disabilities? Likely more than their average pay of $9.67 an hour, or just over $20,000 a year.
What's the social worth of hospital orderlies who feed, bathe, dress, and move patients, and empty their ben pans? Surely higher than their median wage of $11.63 an hour, or $24,190 a year.
Or of child care workers, who get $10.33 an hour, $21.490 a year? And preschool teachers, who earn $13.26 an hour, $27,570 a year?
Yet what would the rest of us do without these dedicated people?
Or consider kindergarten teachers, who make an average of $53,590 a year.
That may sound generous but a good kindergarten teacher is worth his or her weight in gold, almost.
One study found that children with outstanding kindergarten teachers are more likely to go to college and less likely to become single parents than a random set of children similar to them in every way other than being assigned a superb teacher.
And what of writers, actors, painters, and poets? Only a tiny fraction ever become rich and famous. Most barely make enough to live on (many don't, and are forced to take paying jobs to pursue their art). But society is surely all the richer for their efforts.
At the other extreme are hedge-fund and private-equity managers, investment bankers, corporate lawyers, management consultants, high-frequency traders, and top Washington lobbyists.
They're getting paid vast sums for their labors. Yet it seems doubtful that society is really that much better off because of what they do.
I don't mean to sound unduly harsh, but I've never heard of a hedge-fund manager whose jobs entails attending to basic human needs (unless you consider having more money as basic human need) or enriching our culture (except through the myriad novels, exposes, and movies made about greedy hedge-fund managers and investment bankers).
They don't even build the economy.
Most financiers, corporate lawyers, lobbyists, and management consultants are competing with other financiers, lawyers, lobbyists, and management consultants in zero-sum games that take money out of one set of pockets and put it into another.
They're paid gigantic amounts because winning these games can generate far bigger sums, while losing them can be extremely costly.
It's said that by moving money to where it can make more money, these games make the economy more efficient.
In fact, the games amount to a mammoth waste of societal resources.
They demand ever more cunning innovations but they create no social value. High-frequency traders who win by a thousandth of a second can reap a fortune, but society as a whole is no better off.
Meanwhile, the games consume the energies of loads of talented people who might otherwise be making real contributions to society -- if not by tending to human needs or enriching our culture then by curing diseases or devising new technological breakthroughs, or helping solve some of our most intractable social problems.
In 2010 (the most recent date for which we have data) close to 36 percent of Princeton graduates went into finance (down from the pre-financial crisis high of 46 percent in 2006). Add in management consulting, and it was close to 60 percent.
Graduates of Harvard and other Ivy League universities are also more likely to enter finance and consulting than any other career.
The hefty endowments of such elite institutions are swollen with tax-subsidized donations from wealthy alumni, many of whom are seeking to guarantee their own kids' admissions so they too can become enormously rich financiers and management consultants.
But I can think of a better way for taxpayers to subsidize occupations with more social merit: Forgive the student debts of graduates who choose social work, child care, elder care, nursing, and teaching.
ROBERT B. REICH's film "Inequality for All" is now available on DVD and blu-ray, and on Netflix. Watch the trailer below: