The bean counter rejected our small office party.
bean counter
idiomA person who is excessively interested in controlling or reducing expenses, increasing profits, or in quantitative details in general.
Origin
disputed originProbably from German Erbsenzähler (literally “pea counter”).
Our new manager is a real bean counter who questions every coffee purchase.
The creative team groaned when the bean counter from finance slashed their travel budget, insisting every receipt be justified.