I largely agree with the observations in the article although I believe the author misstates the intention of government with
"But in the 1980s, folks in power decided bigger was better, and conventional political wisdom followed suit." The issue with the 80's was that the US economy was in a very weird place where we had low growth and very high inflation (called 'stagflation' at the time). The mechanics of the economy were adjusted not to make 'bigger better' but instead to break out of the state of stagnant inflation.
That the changes weren't undone in the 90s when much of the economic forces were re-aligned was a problem, but understandable since nobody wanted to go back to that mode. We are living in the opposite local minimum of growth and deflation where the economy is growing but inflation isn't happening because real income is going down.
That said I believe that making single supplier contracts unenforcable would be an interesting change to try.