I suspect the similarity is just a coincidence.

There was a lot of social pressure in the past for permanent marriages. That doesn't mean they were happy marriages. With the social changes in the west in the 1960s, divorce became more socially acceptable. Legal changes meant women had the ability to join the workforce and support themselves. People in unhappy marriages had options to seek happiness elsewhere. Those options didn't exist before.

For job retention, the problem is that changing jobs is often the only way to advance. I lost my best worker because the suits wouldn't give him a raise. He now makes more than I do at a different company. He liked his job with us, but he tripled his pay by leaving. My coworkers all tell the same story. I'm one of the lucky ones that managed to move up in the company, and that's only because I had the boss over a barrel.