It actually seems like most buffets raise prices while cutting costs and quality. It gets to the point where the quality (and, in turn, the word of mouth) is so bad that people stop going, and the buffet can never recover.
I've never heard of Pappadeaux serving a lunch time buffet.
Mrs. Swede now limit ourselves to a local Indian buffet maybe once a quarter, and we also do a Sunday brunch buffet somewhere about once a year.