Well, agricultural subsidies are also needed because agriculture has become too efficient. The dairy industry is prime example in both US and EU of agriculture

Well, agricultural subsidies are also needed because agriculture has become too efficient. The dairy industry is prime example in both US and EU of agriculture that overproduces so much milk that the US has farmers demanding we sanction Canada for their milk quotas (Canada using the quotas on all their farmers to prevent overproduction) and the EU dumps their milk on Africa and prevents any development of the dairy industry in Africa. The same applies to so many other types of agriculture. Nobody wants to let farmers go out of business for decades now in the Western world. And the rate of "natural attrition" hasn't matched the rate of technological efficiency improvements. There is of course agriculture that isn't as efficient because higher human labor required for things like picking and sorting. But the automation for that is slowly coming.