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It's not failing, they're producing more than ever. It's just automating. We've been doing that to agriculture since it was developed.
Coal mining isn't too dissimilar FWIW (except it would be great to not mine it at all!), we're currently producing way more coal than when coal country was in boom times. It just uses a ton less people than it used to.
You tend to see a lot more corn in storage (occasionally this is just huge piles of corn covered with a tarp!) right after harvest time, precisely because that's when the prices are the lowest. There's a surprisingly big market for huge containers that are designed to store crops for long periods of time.