This is wrong, VIP status member only skip guest interaction, it doesn't mean that you will be able to always give to customer a successfull job.
I explain better with an example, if you try to please a VIP guest level 4 with a girl that has only skill level 1 you will fail, but the interaction with the guest will be skipped.
Level 3 guests with 2 stars or more or level 4 guests are harder to satisfy than before, so you have to set up the skills, items, cards and upgrade the rooms to satisfy them.
At level 4 you can achieve at maximum of 80-85% score with maxium level 4 skill, the correct item, cards and room upgrade (depends on the room, if I remember well not every room can score 85%).