NW1
'I thank goodness that I don't'
I suggest you search for 'Antigua' s posts, as a Big -400 Captain his experience suggests otherwise.
The legal/company minimum fuel is just that - the minimum. I'd leave rather than work for a company that really pressurised me to take less fuel than I as Captain felt satisfied with.
There will always be a minority who carry minimum and those who take more than I would, I'd rather pax with the latter.