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But they don't have the property to make that happen.

One little pertinent fact about Marxist economics is that Marx thought early American was not a capitalist society for exactly this reason. Because most people were small-time farmers and therefore owned their own means of production, they approached the market as individuals capable of bargaining. Capitalism happened when the farmers gave way to industrial workers who did not have the ability to negotiate because, lacking the means of production, they didn't have a way to live without the approval of the business men. To go back to the tractor guy making his neighbors unemployed, what do those neighbors do? Sure, they could refuse to purchase from tractor guy, but tractor guy doesn't care because he sells his goods on a national market. Your unemployed neighbors boycotting you? Fuck'em, sell your goods in the city. Neighbors won't talk to you in church? Fuck'em, go make new friends in the town next door. Those unemployed neighbors have no recourse because they have no power to bargain. And at the end of the day they have to buy food from somebody (if they can afford it), and chances are that person will be another dude with a tractor.
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To add to Vilage's point too: within the greater context of the Dust Bowl and the market crash of the thirties it's not like these farmers had ANY means to stop the banks from simply taking their land to make good on debts and plough it down to plant cotton. During the first World War they were encouraged to grow more and more mustard and wheat and principle food-stuffs to feed the soldiers and the allies through subsidies tossed around by Herbert Hoover, who was acting agriculture secretary at the time. They were able to buy more land and fancier modern tools because times were good during the war and the money was coming in and they could confidently take out whatever loan they wanted to pay for whatever they needed to make more money and take out more loans.

Then the war was over, and the price of wheat declined, and the farmers needed to repay their debts and interest so they began to do what they could: plant. They hoped to plant enough wheat that when sold on the national or global market they could repay off their dues through sheer mass. This of course failed, and the set the stage for the environmental disaster known as the Dirty Thirties and the stage for the Grapes of Wrath got set.

By that point in the story no one had any money because the bank took it all and they were barely living. The Jobes didn't pull off the same tricks as other communities were the neighbors and everyone in town would go to a property auction to keep out the bankers and all bid pennies on land and equipment that'd be returned to the man in debt (Anarcho-Commies love this). But for the Jobes, everyone left because the bank had already taken over all the neighboring farms, and as chanted several times at that point in the story: "The monster's sick".

The monster's sick because it took everything they already had. The monster's sick because it crashed down after a period of artificially high demand and subsidized high-production volume. The entire Great Depression is one great situation that proves the point of Marx: Capitalism is a system doomed to forever be staring down a state of crisis.

Now, you can  fix this with Vanguardism if you'd like. But then we come to the Soviet dilemma. But really, I'm thinking seizing all the toothbrushes would be a good idea right now.