maybe it's a slippery slope toward greater productivity, worker well being and company profitability? The 8 hour day was negotiated from unregulated work hours

maybe it's a slippery slope toward greater productivity, worker well being and company profitability? The 8 hour day was negotiated from unregulated work hours based on workers rights (http://en.wikipedia.org/wiki/8_hour_day http://en.wikipedia.org/wiki/8_hour_day) I'd be surprised if any knowledge worker averages MORE than 6 hours work a day so why should they be bound to the office for eight?