The NMS has electric power steering except for the 2.5L models. They use a conventional hydraulic system. The NCS Jetta is the same, plus the S 2.slo cars also have hydraulic.
This has nothing to do with the subframe, however.
No VAG products use electric/hydraulic power steering*. The Toyota MR2 Spyder, some Ford-based Mazda products (3, 5, etc.), and many ChryCo MB-based LX platform cars (Charger, etc.), and a bunch of newer Nissans, do. Some of the newer Audis do use a variable assist control solenoid on the hydraulic rack, however. But the system still uses a conventional engine-driven pump. All the little solenoid does is vary the level of assist based on road speed. Which is something that has been around for a long time. Honda was using this in the '80s, first with a little bypass valve driven off the speedometer cable drive then later with a solenoid.
*that I am aware of. Something like an R8 or a Bentley model or whatever I have no idea.