For more insight into this, look into the US's history with the decline of the auto industry, the steel industry, and the coal industry. (These are just the one

For more insight into this, look into the US's history with the decline of the auto industry, the steel industry, and the coal industry. (These are just the ones that immediately pop into mind. I'm sure there are plenty of others, not just in the US, too.) In short, people don't like to change their jobs very much.