No, they don't offer 4 times as much. Hauck's base put him at $315K if I remember right. He had bonuses and stipends based on just his contractual obligations (public appearances) that added another $46k, so he could count on $361,000 every year. He was also bonused based on on the field success and academics, and his total package was reported to be over $400k.
Google tells me Illinois' DC was contracted at $700,000. It is a very significant raise, but it is certainly not 4 times as high as the Griz pay.