Everything you need to understand or teach Burning Chrome by William Gibson.
Of course, radical body alterations cost a lot of money. Of the ten stories in Burning Chrome, many feature characters that could be considered to be trying to get ahead in an information-driven, class-divided society.
In "Johnny Mnemonic" the mental courier Johnny finds himself out of a job when his broker (or fence, depending on your point of view) stores Yakuza stolen data in his head. In order to avoid being killed, Johnny...