My problem is that I see this used as way of forcing unpaid overtime on to workers by creating unreasonable release dates. In an agile environment where people

My problem is that I see this used as way of forcing unpaid overtime on to workers by creating unreasonable release dates. In an agile environment where people are given lots of autonomy and can give accurate estimates I like your idea, but it seems for most it will be a disaster. We've recently had a client demand we deliver a month earlier on 6 month project in a 5 man shop with only two months left. If it wasn't for paid overtime I'd bail out of here.