As far as I know, wages are determined by many factors. If you have a young player, playing in the first team for 5 years on 1Kpw wage, of course he will want more than doubled wage. I some cases, you can lower their wage (if they don't play much, if they get old...), but it's also natural that they want bigger wages every time. I think wages are not so unrealistic. It is possible to keep them low, for example I won La Liga with Sevilla and all my players had less than 50Kpw.
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