Interest based financial system discourages investment in socially optimal profitable projects, but which are not favored because of relative cost comparison from the market interest rate. If sales do not increase, it may lead to business cycle fluctuations with unplanned increase in inventories. With increased pressure to service debt, the environmental degradation and human resource exploitation may become common and secondary concerns.
Time value of money is the problem for the investor to avoid keeping his/her money idle and to avoid forgoing the use of money that may bring positive value to his/her investment. However, it does not mean that the investor can demand an arbitrary increase as the cost of using money without taking the risk of a productive enterprise.