I would be wary of the 95% figure. Another user on HN (who currently works at FAANG) pointed out that he took the test used in that survey and failed. The interface for the coding test was not reflective of how actual software development is done (ie no syntax highlighting, memorization, etc). Even accounting for the diploma mills and the private universities with underresourced CS departments, the 95% figure seems unusually high.

Even if we assume for the sake of argument that that's true, I think that only enhances my point: there aren't enough engineers that these companies are willing to employ such that they would tip the scale on the supply/demand balance sheet and push compensation down (in real terms; obviously every additional marginal engineer pushes down compensation in counterfactual terms).