Salary Freeze
  
Heat makes things rise. Cold makes them go down. Freezing? It stops everything, not moving. Like eating two pints of dry matzo brie.
So when salaries are frozen, they ain't goin' up any time soon. Why frozen? Eh, lots of reasons. The biggest issues management point to revolve around "the economy" or "business conditions" or "competitive threats" or whatever. Salaries stay flat because management needs margin room or capital that would have been spent on salaries to invest instead. Whatever works.
See: Reduction In Force.