I think that providing modern monitors that make sense is probably the easiest way to please employees. No matter how excellent the salary is, if they are stuck working on old, small, blurry, faded screens, they'll be unhappy. It also gives a bad impression of the company as a whole. I did L1 tech support a long time ago, and people were overwhelmingly happy to see me coming to replace their old CRTs with LCDs.