Annual income twenty pounds, annual expenditure nineteen six, result happiness. Annual income twenty pounds, annual expenditure twenty pound ought and six, result misery.
I do not believe the expenditure of $2.50 for a book entitles the purchaser to the personal friendship of the author.
Political history is largely an account of mass violence and of the expenditure of vast resources to cope with mythical fears and hopes.
To predict the behavior of ordinary people in advance, you only have to assume that they will always try to escape a disagreeable situation with the smallest possible expenditure of intelligence.