It's engrained in Thai society you are not going to stop it, I've been around here long enough to see plenty of it going on, where do you start? Land department then you can go to the business development department and on the same soi is the labour department give them a visit,
You want a yellow book? now there's a story in Phuket,
I've seen this farang wait nearly 7 month for a work permit, obviously he didn't slip a few quid in the folder.