Efficient markets should be what every economy strives for. Essentially, the sign of an efficient market is where there is an equilibrium between what buyers are willing to pay for a good or service and what sellers are willing to sell for a good or service.
If you can improve the way you produce a good or service by doing things such as outsourcing certain processes or buying from an overseas supplier that offers discounts, you can then afford to lower your selling price which results in increased demand and affordability.
Even if businesses don’t lower prices, they can make additional profits and then reallocate that excess profit into doing things like increasing wages, taking on more investments or even creating more expansion projects.