The wine caves are likely for human trafficking, but not for simple votes, labor, or sex slavery. What is a human body with when parted out?

If people can be blackmailed with pedo stuff, they can be controlled even tighter when you supply the organs they need to live. Covered in gold means the inside is bad.

This is why a certain house on Ketron had a "bunker" that looked like a freezer, and why Estein had underground facilities. Its about temp stability and refrigeration.