When subsidiarity is respected, solidarity occurs. Solidarity ensures that the widow of a worker who dies is provided for. It watches out for the physically and mentally handicapped, the newly-arrived immigrant, the elderly or retired individual, to make sure that their needs are met. Today the government and corporations regularly promise to meet the needs of everyone, but it is a promise every thinking person can recognize as patently unrealistic. Because of a lack of subsidiarity.
Governments are too big and unwieldy to be humane.
Corporations are too large to adequately care for all their workers. Now, while many of us may perceive this clearly in the realm of politics and ethics, we are blind to it in economics. Think about it. The diner near your home owned by a local man may desperately need your business to survive. The exercise of capitalism is now erasing the opportunities that made America the nation it is.