36
POLITICAL ECONOMY
utility and the possession of individual
goods. We are in danger of slipping into
making baseless assumptions, and therefore
of reaching unwarranted conclusions, when
we rashly skip examining experience in the
mass and hasten to deal at once with questions
of detail. Let us ask then, What is the
relation between utility and income ? bearing
in mind that utility is to be taken simply as
a label objectively representative of choice.
There can be no doubt that in all ordin
ary cases the utility which we get out of
our incomes increases at a diminishing rate
as income increases, at least after a time.
We know this directly from our every day
experiences, and it is not difficult to find
subjective reasons for it. We always try
instinctively to assuage our most rgent
cravings first ; consequently when fortune
brings us an augmentation of income we
realise, if we have not realised it before, that
the desires left to be appeased are less intense
than those which received prior attention.
There are cases to which the generalisation
does not apply, for instance, cases in which the
whole character of a person’s life is altered
when his income has reached a certain figure,
but such exceptions may be neglected for
present purposes. The declaration that an