We could perhaps help the medium-sized companies and, to a lesser extent, the smaller companies as well. We should encourage networking and the creation of industry clusters in certain regions, so that several complementary plants would locate next to one another.
However, If an unforeseen market fluctuation were to affect one of the plants, it would not necessarily threaten all of the community' s industries. The other factories could hire some of the workers who have been laid off temporarily, which would be a great help.
For any given number of workers, a network would be much stronger than a single entity. That would be one possible solution.