When I read about the tragedy in Bangladesh, where hundreds of garment workers died when the building collapsed, it reminded me of the Triangle Shirtwaist Fire. Working at NYU, I frequently walked past the building where over 100 immigrant girls perished in a factory fire. The doors were locked. They could not escape. They could jump from the 12th floor or perish in the fire.

Events like these gave birth to the labor movement. Working people didn’t stand a chance until they organized to have a collective voice. The factory owners could treat them like human waste or lock them into their squalid work quarters or pay them as little as possible, and they had no alternative but to take the abuse or lose their job.

Unions changed that. They compelled factory owners to improve working conditions. They used their collective strength to elect officials with a social conscience. Unions changed working conditions for all workers, not just their members, and they enabled working class men and women to join the middle class.

Big business never liked unions. But only in recent decades has big business found a way to escape the legal structures that regulated wages and hours, safety, and working conditions. More and more corporations discovered that they could lower costs and improve profits by outsourcing their work to poor nations. First they fled to Mexico, then to Asia. They move their factories and facilities wherever they can pay the least.

So now we see the same conditions in China, Bangladesh, and other countries that our nation experienced a century or more ago. We see American and global corporations manufacturing their goods wherever wages are lowest (in the factories in Bangladesh, it was $40 a month), with no regard to safety or working conditions or child labor.

We pay a price too, though not so great as the price paid by the factory workers in Bangladesh. We have plentiful cheap goods, but we have lost the good manufacturing jobs that sustained millions of workers. Our leaders say that education will fix everything, and someday everyone will be college-and career-ready, but they forget that schools and colleges don’t create jobs.

I don’t have the answers to all these problems, but I have an uneasy feeling that our elites are getting fatter as the middle-class grows more insecure about the future. As I watch the war against unions, I wonder why so few people remember why unions were created.

And I worry about the disappearance of good middle-class jobs, as they are exported and turned into low-wage work and as they are replaced by technology that requires no workers at all. A friend who is now retired used to supervise a candy plant for a big corporation. It employed nearly 1,000 workers, each of whom supported a family. The same plant now is run by two or three people. Everyone else became superfluous.

Leo Casey at the Shanker Institute drew some parallels between the disaster in Bangladesh and the factory explosion in West, Texas.

I worry for our nation. Some inequality is inevitable. Dramatic inequality is toxic to the spirit.