“The choice we appear to be making is trying to modify our way out of this, which has the effect of lengthening the crisis,” said Kevin Katari, managing member of Watershed Asset Management, a San Francisco-based hedge fund. “We have simply slowed the foreclosure pipeline, with people staying in houses they are ultimately not going to be able to afford anyway.” Mr. Katari contends that banks have been using temporary loan modifications under the Obama plan as justification to avoid an honest accounting of the mortgage losses still on their books. Only after banks are forced to acknowledge losses and the real estate market absorbs a now pent-up surge of foreclosed properties will housing prices drop to levels at which enough Americans can afford to buy, he argues.