You could, but not without sacrificing many of the features that make the Surface Book unique. The pen support in Windows 7 is significantly worse, and face authentication wouldn't work. Windows 7 isn't very usable on a tablet. To use the GPU when you reattached the tablet you'd likely have to reboot the machine, also a much slower operation on Windows 7.
If you don't want the above features, you could get a machine that runs Windows 7 well with good hardware specs for less money.
PCs do not have a standardized BIOS. BIOS configuration options vary widely, and often mean different things between different BIOS vendors. UEFI is standardized but sometimes difficult to adopt.
Device drivers run in kernel mode and can bugcheck the machine. Microsoft can certainly provide tooling and help device driver writers write reliable drivers, but the device is still responsible for it's driver.
Clinton prefers a $12 minimum wage because outside of cities small business wouldn't be able to keep up with $15. Clinton wanted $15 minimum wage to be passed in cities that can handle it, and has explicitly supported people organizing those efforts.
From the primary debate:
"While Clinton believes $12 an hour is the right federal minimum, she is not steadfastly opposed to the idea of a $15 hourly minimum nationwide. On Thursday, CNN's Wolf Blitzer asked if she would sign a bill from Congress setting the federal minimum at that level (something that would be politically improbable). "Well, of course I would," she said."