The number is evidence about the government, not the pirate
The bounty is the best gift a franchise has ever handed this site and the worst
trap. It is canon, it is numeric, it is issued by a body with global reach and
excellent intelligence, and the characters themselves quote it at each other.
Everything about it invites use as a ranking.
It is not one, and the manga is not being coy about this. A bounty is set by
the World Government, and the World Government is a party to the conflict. It
prices what a person costs it — the damage they do to its institutions, the
example they set, the number of member states that complain. Strength is one
input among several and not the largest.
Three consequences follow, and all three are visible on this page.
Marines have no bounties. Not small ones — none. Garp fought Roger across a
career and beat the Rocks Pirates, and his figure is blank, because a
government does not post a reward for its own officer. Any ranking built on
bounties silently deletes the entire navy, which is roughly half the strongest
people in the world.
The number lags reality by years. It is revised when the government notices,
which is after the fact and sometimes long after. Every figure here is a
snapshot of an opinion held on a particular day by people working from
incomplete reports.
And it can be simply wrong. Buggy is the case that proves the rest. He holds
the eighth-largest bounty ever issued because his subordinates were mistaken
for his employees and because a printer put his face in the middle of a poster.
The government was not lied to; it read the evidence available and drew a
conclusion that a reader of the same chapter can see is false. That is what a
published ranking looks like from the outside, and it is worth remembering when
reading this one.
The ranking above is a different kind of claim, not a better-informed version of
the same one. It is argued from what a chapter shows a person doing, which has
its own failure — a serialised story is still being written, and anybody here
may be revised by a chapter published after this page was. The bounty column is
printed alongside because the disagreement between the two is more interesting
than either.