How can a friend of mine get her son to get a job?

A friend of mine has a 25 year old son who doesn’t have a job, and is not motivated to get out on his own. He did for a short while, in his early twenties, hold down a full time job and paid some rent living with his father. But, the company hit tough times, he lost his job, and his dad basically kicked him out, and for the last couple of years he lives with his mom and younger brother. His mom, my friend, is beside herself trying to figure out how to motivate him.