Don't think having money and a loud voice means you can look down on people.
Tips
usage
Usually pejorative — implies the money buys rude confidence rather than earns respect. Occasionally neutral-descriptive ('well-capitalized and imposing'), but context almost always tilts critical. Common in both business reporting and personal complaints.
memory
Two parallel couplets: 财大 (wealth big) → 气粗 (temper / manner coarse). More money (财) = thicker / coarser (粗) attitude (气). The cause-effect is built right into the structure.