'Tis money makes the mare to go.

Money is the practical force that gets things moving. Payment, profit, or financial backing can motivate people to act when goodwill or abstract promises alone do not produce results.

The saying can imply a cynical view of cooperation: apparent enthusiasm or compliance may depend chiefly on being paid. It emphasizes material incentive rather than personal devotion as the engine of action.

Use it to remark that a task, agreement, or service will proceed once adequate payment or funding is available. It can sound wry, skeptical, or dismissive in sensitive situations, especially when money seems more persuasive than principle or goodwill.