Real borrowing as a method of financing public services should therefore be limited to the financing of public expenditure project that are expected to yield benefits over a long period of time that is those that are expected to be of a permanent nature. Here the analogy with the private economy is quite close. Business enterprises normally borrow that is sell bond to finance capital expansion programs. Borrowing is Accepted as an appropriate method of financing outlays that are bunched in time and are devoted to the purchase of equipment which will last over a long period. The principle of amortizing the debt over the period of the useful life of the project is accepted in business and this principle is also applicable to government units.