In the Austin area for Samsung, there is an order of magnitude more staff dedicated to verification and validation as part of the manufacturing process than chip design. My perception was that the chip design folks (SARC) are like the golden children of the ecosystem. Their salaries reflect that it's obviously a more competitive, demanding environment. I don't know how hard it would be for a fab engineer to transfer positions from SAS to SARC, but I do remember that it was not a common occurrence.