Londo111 nailed it.
This is a matter of social evolution.
Phizzy - I think we are on the same page. I did understand the OP question, however variants of this question get asked time and again. My point is that we are largely asking the wrong question. It is a matter of stating the obvious that they know something when they do it, (such as lie). Unfortunately, for these guys, that doesn't matter because they believe they are doing so for good reason, (the end justifies the means).
If we are truly going to understand the way high control groups work, we need to understand the science(s) involved. As Londo111 points out, the organization did not develop into the high control group that it is overnight. This is a matter of evolving certain social memes that "worked", (one of which is evolving techniques used for manipulation). This is a gradual process, given the psychology involved. Looking for some silver bullet to point to as "the" control mechanism being employed, (what most folks here are asking when they ask questions such as do the GB know they are using mind control techniques), is really not possible, due to the gradual nature of its development and the nuance involved. It takes some time out to fully see this, (and also comparing the WT to other high control groups and looking for parallels), however it does become clearer over time. The R&F do it too, it just gets worse the higher one "makes" it in the org.