Thanks to Bob Lawless and this Credit Slips article, a previously-unconsidered instance of anchoring just came to my attention:
Research from Professor Neil Stewart (University of Warwick) indicates that the presence of a minimum payment on card statements caused people to pay 43 percent less toward their credit-card debt than they otherwise would. Revolving cardholders see that bold minimum payment number printed on their statements, we surmise, and somehow in their minds the minimum-payment figure takes on importance — when in fact it really should have none (insofar as to what's in the cardholder's best financial interest, anyway).
When they make the decision of how much to pay that month, the cardholder subconsciously "latches" to the minimum-payment amount. It becomes an anchoring point — a low one whose implementation certainly benefits the card company — that has a lowering effect on whatever final decision Joe Cardholder makes.
From a short article at The Economist:
Yet another reason why — despite all the "It's not fair!" debtor outcry — minimum payments ought to be (and have been) raised.