To many economist, a persistent unemployment is a sign of market failure as it is a waste of scarce represents that leads to a loss in potential output of the economy. This means that the economy is producing well below maximum capacity. As unemployment rises, the real national output contracts and the economy is producing below its full capacity.as the unemployed could have been producing something of value to the economy but they cannot, hence this means that the society is deprived of a higher output and standard of living, for as long as those people remain unemployed.
furthermore, unemployment represents a waste of resources that could have been used for training and education of workers. ?And the longer the period of unemployment, the greater the loss in skills and motivation. Thus, a high rate of undemploymeny would reduce the quality of the labour force and hence the country's economic growth potential