The Federal government per diem rates are higher than necessary. For instance, in Punta Arenas, the rate for 2010 was $99 when a fairly large meal would cost ~$20. Even with incidental costs, the $99 figure is excessive, and this trend seems to be true for every place I have traveled. Reducing the per diem paid to everyone who travels while working for the government could greatly reduce government expenditures.
In addition, while on travel, I have typically been put in nice hotels with rates around $100/night. This is unnecessary. Less expensive motels, provided they have internet access, would be sufficient and would also reduce costs significantly.