No - disagree, Doug. We tend to use the passive if we don't want to use "they", as in "There is said to be important news"; or to generalise "they" to something slightly more specific ~ "People say that ..."   But "One says that ..." just is not English to my ears.

I should be interested if you can find a quote from PGW anywhere in which Bertie Wooster says anything of the sort you suggest. I am sure Jeeves would have given him one of his looks: or Aunt Dahlia.

~M~