In my personal experience as an employee, if it's possible for you and your company, allow them to work from home once or twice a week either through Remote Desktop/VNC/whatever on the company's VPN or bring a laptop home. If your employees are responsible, working from home means less interruptions, greater focus and therefore more productivity. It also means less commute for them and more free time, less stress and they can take care of home chores like doing the laundry while they work or take their time preparing dinner. It's also easier for them if they have kids since they can just be there when they come home.
Just-in-time manufacturing avoids having excess inventory, but R&D is a cost that can only be recouped through selling inventory. They invested money in designing the case and need to recoup that investment. Seems fair they are not taking that design and selling it with Windows on it.