The UK view of lawyers is not that they are distinguished by being grasping and unscrupulous, but that the bewigged section of the legal profession i.e. barristers and judges, are stuffy, exclusive, assured of an easy living for life and drawn almost exclusively from a privileged and almost hereditary caste. This view may have held true almost until the end of the 1980's, when various Royal Commissions pointed out the rather narrow range of backgrounds of top barristers and judges.
As far as humour goes, their perceived prejudice in favour of "the old school tie" led to such memorable skits as Peter Cook's sketch, "Entirely a matter for you", which featured in the 1978 Amnesty International revue, "The Secret Policeman's Ball".
As regards their lifelong tenure and career in the Old Bailey and other courts, one need read no further than John Mortimer's "Rumpole" books. (Mortimer himself is a Q.C. or Queen's Counsel. This honour on the one hand recognises him as one of the most highly skilled advocates. On the other, the process by which it is granted is itself a matter of approval by the stuffier or more conservative senior members of the bar.)
My own lawyer jokes come from far lower down the legal pecking order. A man accused of some petty crime is being questioned at a Police Station. His solicitor (or "brief") is present.
Police Officer Well, Fatty my son, it appears that you are well in the frame for this one. An eye-witness saw a suspect leaving the scene of the crime. The description of him is quote, fat, greasy, slovenly and unshaven. Anything to say to that ?
Solicitor I would point out that my client is smartly dressed, well turned-out, clean shaven and of average build. Or at least he will be, by the time this goes before a jury.