That's the opposite of what your link shows. While wages have not kept up with growth in the economy or overall productivity, they have absolutely "kept up with

That's the opposite of what your link shows. While wages have not kept up with growth in the economy or overall productivity, they have absolutely "kept up with inflation," and a tiny bit more, i.e., the average wage has the same buying power now (or a little more) as the average wage had decades ago after adjusting for inflation.