Hi Patrick,
Apps are account specific.
You can use your Microsoft account to sign in to the Windows Store and install your apps on different PCs.
Please refer to this link for more information:
http://windows.microsoft.com/en-in/windows-8/windows-store-install-apps-multiple-pcs
You cannot share apps between different accounts.
Please let us know in case you need any help on this issue or any issues related to Windows.
As I said in the original question I am aware of how to install the same app under different profiles. I am wondering if there is going to be some sort of fix to how the storage is being wasted by not having a shared program folder that would serve both users if both users have the same app installed. I'm guessing based on the statement "you cannot share apps between different accounts" that the problem is never going to be addressed in this version of Windows.