In agriculture, people tend to ignore the problem because it leads to lesser profits in the short term. The food industry, one of the major clients of agrobusiness is very competitive. The phyto pharmaceutical industry keeps pushing their products just like the pharmaceutical companies in hospitals. In fact, they're the same corporations most of the time.
In this case, lobbying happens in the Union level, i.e. the European Parliament.
The pressure is to great for small farmers to deal with.
That is also happening with the construction/concrete lobby (and I presume that sometimes the land price rises if you plan to build housing around cities in the countryside).
Construction companies build regardless of erosion or flooding problems. It's not their problem once they finish the job. That happens a lot around here. Politicians only think in the short term. "Yeah, sure there's the problem of seasonal fires, draughts and floods. We'll make use of some catastrophe fund. But you can't forget jobs in construction and tourism infrastructure!" Result: concrete all over.