They don't make it clear in the article, but presumably the top 10 percent of salaries includes most/all developers? It's not really surprising that the heart

They don't make it clear in the article, but presumably the top 10 percent of salaries includes most/all developers? It's not really surprising that the heart of the tech industry (which drives a large part of the modern economy) would have very wide disparity between service workers and highly skilled specialists working for companies making massive amount of revenue.