If the supply side has not been able to sufficiently meet such new demand, then it might not merely be the problem of an output gap but the problem associated with a mismatch between demand and supply, namely, demand has not been meshing well with supply.
For example, in medical and welfare industries, it has been often said that, despite expectations for further demand due to aging, sufficient services have not consequently been provided due to various regulations and a labor shortage in the field.