Many years ago running my own business, my partners and I were having a fret over a 750,000 grand overdraught.
A client of ours, much bigger than we were of course said simply, "look if you owe the bank a tenner they will chase you to hell for it from the day it's due, if you owe them a million, they will ask nicely and always give you time".
It seems that's what HMRC are doing with the big boys, although the Multi national debtors, quietly suggesting to pull out of the UK entirely, might also have a calming effect on HMRC and GOV UK, don't you think?