Taking money from the poor

In his article on micro-credit, the Undercover Economist Tim Harford asks “Does no-one want to take money from the poor?”

An interesting quote:

The trouble with living on two dollars a day is that you don’t actually get two dollars a day. One day you might get five, then nothing for the next three days. Income is unpredictable. Outgoings, too, are irregular. Emergencies crop up. Under the circumstances, the most basic financial product, such as an easy-access savings account, would be invaluable.

Obvious perhaps, but something I had never given thought to.