For example, thanks to the dominance of public sector unions, New York now has nearly 300,000 unionized public sector employees receiving over $100,000 a year:
https://www.forbes.com/sites/adamandrzejewski/2020/05/26/why...
NYS public school teachers with 35 years of experience receive a pension of $87,945 per year on average:
https://www.nydailynews.com/news/politics/pensions-retired-n...
When you amortize the average amount paid out in total in pension, over the work years, and add that to the other components of their annual compensation, this puts NYS public school teachers in the top 10% of income earners in the US.
It's also incredibly hard to fire New York state public school teachers:
https://www.the74million.org/article/investigation-nyc-tried...
Why this is so important was explained by Smith:
The real and effectual discipline which is exercised over a workman is that of his customers. It is the fear of losing their employment which restrains his frauds and corrects his negligence.
Without fear of dismissal, fraud and negligence multiplies, and thus we see growing inefficiency in the public sector, even as public sector unions direct an increasingly large share of economic output to their members:
https://ourworldindata.org/grapher/social-spending-oecd-long...