When most countries had national monopolies, crews could negotiate pay raises and good pension benefits (something that costs money for the airlines only in the long term). During this period, most passengers were business travelers who paid high fares that covered these costs. After deregulation, which led to lower fares, many airlines remained bound to these salary agreements and pensions, whereas new low-cost carriers employed new staff with lower salaries, especially for cabin crew, keeping personnel costs low and allowing for competitive fares. In some cases airlines have gone bankrupt (e.g., Alitalia, Sabena, and Swissair), and new airlines replaced them.