The appeal here is to make it easier and more cost effective for businesses to start up, hence providing jobs. Right now these jobs will be available to people who simply have a computer with an internet connection and help the business to Compute, Storage and/or Network.
Theoretically, couldn't a business owner minting and accepting Viva pay employees to do virtually any task or job that needs doing?
I definitely would think so. While those three were the starting options, they did say they expected more in the future.
I'd think that these were a benefit as a cost and maintenance saver and don't see anything keeping other business types from coming on board if they wanted. The biggest thing that comes to mind would be someway to report when a task was completed and satisfactory, if they were something outside of a networked computer. My main uncertainty would be their fiscal benefits of doing so depending on what the business actually was.
Im sure William banks will chime in :)