You are very intuitive. My comment initially read "I don't think they'll really agree...", and then I changed the last word to "see" when I realised I wasn't s

You are very intuitive. My comment initially read "I don't think they'll really agree...", and then I changed the last word to "see" when I realised I wasn't sure whether I even agreed with it myself. My team certainly does do things like writing unit and integration tests and developer documentation, and these are things I do charge clients for (though sometimes even these things can be difficult to explain as a line item on an invoice - but, as others often say here, the kind of clients who are problematic about that sort of thing are perhaps not the clients you really want to work with). Personally I would have a hard time explaining to a client that we spent their paid-for time improving something "for the greater good" that may or may not have a direct, quantifiable benefit for them.