Just talking to my very experienced instructor yesterday about the CPL, he was saying a well trained PPL student should walk through a CPL test after a little bit of polishing up; what does that tell you?
Providing that the handling skills are there, the rest of it is about convincing the examiner that you have the confidence and initiative to fly an aircraft safely. Any decent examiner does not treat a PPL or CPL test as a box ticking exercise, unless they are a moron. They will be looking to see a SAFE and confident pilot, they will not fail you on a formality if you are a 'switched on' pilot.
Saying all that, when you have lots of money, you can buy almost anything in life.