It isnt city folk that did that. Unless you mean rich bankers and corporations. Them city folk?
Actually it started with the original "New Deal" by FDR as a way to drive black farmers off their land. Typical Democrat racist policy, pretend to "help" with welfare, and it actually is policy designed to destroy you. It was successful too, driving over 90% of the black farmers in the south off their land and into the ghettos where they were given even more welfare to make sure they never had a chance to improve themselves.
You can read up on it here:
The Butz Stops Here: Why the Food Movement
Needs to Rethink Agricultural History
But the policy never really left and slowly over time it changed from a purposeful attempt to drive black farmers off the land and became a strategy to drive all small family farmers off their land. ESPECIALLY targeted were land owners attempting to manage the land using conservation. Hence the "get big or get out" campaigns from various political leaders after FDR.
A reflection on the lasting legacy of 1970s USDA Secretary Earl Butz
Those policies designed to drive farmers off their land by destabilizing them financially are still in effect today, but because they have become too effective at their designed purpose, there are new policies attempting to pay for new infrastructure for small local farmers. Most of it is gone. Driven out of business by pretty much every side of the political aisle in Washington.
Local Food Promotion Program
Really annoying to have the USDA both subsidizing and regulating the rebuilding of local infrastructure and also subsidizing and regulating the destruction of all local infrastructure by financially destabilizing it
at the same time!
Probably too little too late anyway. Something about a house divided that can't stand?

But at least they figured out the dynamic is destroying the country from the foundation up and something must be done to reverse the trend.
Meanwhile while the foundations of civilization crumble, we still have the biggest environmental crisis known to mankind to deal with, the Anthropocene. And as it turns out the only thing we humans do at anywhere near the scale required to fix that problem is agriculture! .... But right now agriculture is the second leading cause of AGW rather than the largest mitigation strategy for AGW.
We need to change that. We do it by paying for a service and letting conservative capitalism drive the agricultural changes required, rather than trying to continue this micromanaging and welfare programs from the USDA.
Oh and why is it relevant? Because it was the New Deal that caused all this in the first place and the Green New Deal will only make it worse!