USAirways has consistently had the highest labor costs in the industry, primarily because their focus is in the Northeast. Three factors make this region a difficult place to do business, particularly for an airline: (1) unions are very powerful, especially in Pennsylvania, home to two US hubs; (2) the cost of living in the region is higher than just about anywhere in the United Staets, meaning higher wages; and (3) the region has been stagnant economically over the past decade, at least when compared to the rest of the country. All these things make it difficult for US to turn things around. A few years ago, USAirways flight attendants threatened to strike, rejecting a "Parity +1" pay package that would have made their pay 1% higher than flight attendants throughout the rest of the industry. With labor costs like these, it's no wonder their CASM is so high.
"Lose" is not spelled with two o's!!!!