Friend of mine pointed to this story in the Guardian. It talks about the the phenomenon of paying for faster service, for fast-track privileges, etc.
Why worry that we are moving towards a society in which everything is up for sale? For two reasons: one is about inequality; the other is about corruption. In a society where everything is for sale, life is harder for those of modest means. The more money can buy, the more affluence (or the lack of it) matters. But also, putting a price on the good things in life can corrupt them. Paying children to read books might get them to read more, but it might also teach them to regard reading as a chore rather than a source of intrinsic satisfaction. Sometimes, market values crowd out nonmarket values worth caring about.