Part of the reconciliation process is a check against gauging errors.
. . and fraud. At a well known Italian airport I noticed that the uplift error always favoured the supplier.
I noted the figures for a few trips and filed a report. Tech manager said that they knew about the problem.
I guess if we'd made waves there would suddenly have been a lot of unexplained delays for our aircraft.
Please don't let the UK become like those places.