Idioms for 'borrowing others' resources to achieve one's own goal'

I developed a new online algorithm, where an agent is borrowing other agent’s observations to achieve its own goal. I am looking for some idioms or short phrases to express "Borrowing others’ resources to achieve one’s own goal."

I find some like "Rally the troops", and "The fire is high when people gather firewood". But they are not exactly what I want to express… Hope I can get some help here.