You're correct, but I believe this line of thinking is a simplification. If you operate a public company and your shareholders demand a return, odds are you'll have a board that's going to force you to have specific policies. Some of those policies are along the lines of "take any discounts you can get on things that cause operational expenses."
The only real way around this is having shareholders that care about employee privacy, and I think _that_ will only happen if these privacy issues impact the bottom line in some way (difficulty hiring, increased costs, etc).
It's frustrating in that this behavior is cultural and endemic to how businesses operate in the US. Change is possible, but it requires support from more than just the line of business employees and management.