eye to the main chance, have an

have an eye on/for/to the main chance

To be continuously seeking opportunities to advance oneself or make money. The term often refers to someone who is ambitious without consideration of others. Primarily heard in UK, Australia. You just have an eye on the main chance—you don't care if I succeed or fail.
See also: chance, eye, have, main, on

eye to the main chance, have an

Look out for one's own best interest. For example, Tom is watching the company's progress very closely; he always has an eye to the main chance . [c. 1600]
See also: eye, have, main