The Wealth of Nations by Part 2 Chapter 2 Page 63

much short of the advances which it makes to them, it cannot with any safety continue to deal with such customers, at least if they continue to deal with it in this manner. The stream which is in this case continually running out from its coffers is necessarily much larger than that which is continually running in; so that, unless they are replenished by some great and continual effort of expense, those coffers must soon be exhausted altogether.

The banking companies of Scotland, accordingly, were for a long time very careful to require frequent and regular repayments from all their customers, and did not care to deal with any person, whatever might be his fortune or credit, who did not make, what they called, frequent and regular operations with them.

By this attention, besides saving