Continual growth is not healthy

One of the big news stories today is the decline in Chinese economic growth causing a worrying decline in share values and an increasing sense of world economic crisis.  What is it with this need to forever grow?  For good health it is necessary to stop growing at times. This is the case in nature. Plants need to die back in winter, or be pruned, those forced through artificial means are weaker.  Jungian psychology does not look for linear development in people, it is a spiral process, honouring and valuing both the ups and the downs., this is what gives people a greater depth.  What would be the effect if economists and markets saw a downturn as healthy?