> In terms of discussions over beer, many companies successfully create taboos around comp. Larger cultures that are squeamish about talking about money, which includes many of those prevalent in the US, make that even easier for those companies.

<-- US-based. In every salaried position I've held, discussing salary with coworkers was very taboo. At the second place I worked, on my first day on the job, the head of the department pulled me into his office before I even met with my team (aside from the two I'd met in the interview) and told me that I should be aware that "here at $COMPANY, it's against policy to openly discuss salaries with coworkers." Then he winked and said, "we wouldn't want to have to lower you to the standard rate."

I was too shocked to do anything except chuckle awkwardly, nod, and leave. I was a pretty junior dev- if my salary was above their standard rate, I feel badly for anyone who'd been there longer. Though I'm sure it was a joke to lighten the encounter, keeping salaries down by discouraging discussion about compensation is a very real thing.