Nobel Economist Milton Friedman, for one. https://www.youtube.com/watch?v=xzYgiOC9cj4 https://www.youtube.com/watch?v=xzYgiOC9cj4 If you watch to the end he f

Nobel Economist Milton Friedman, for one. https://www.youtube.com/watch?v=xzYgiOC9cj4 https://www.youtube.com/watch?v=xzYgiOC9cj4 If you watch to the end he fully explains how the net effect of unions is to raise the pay of high paid workers and lower the pay of low paid workers. You might also like "Basic Economics" by Thomas Sowell which talks about this phenomenon also.