Having worked at a large software corp I totally agreethat if you're a remote worker you have to work twice as hard on your output. Since you're not there in person to attend all the meetings, you're less "seen". This adds more pressure on you to deliver, get on calls, work weekends, etc.. I've seen people working from home in Australia and deliver amazing results (for a based SF company). If this is indeed about attrition, I think they may be losing more of the people that they would probably want to keep.