You should get a job if you can't afford something.
Greg wants to buy some new sneakers, but he doesn't have enough money.
Greg wants to get more money.
Greg will get a job at his local supermarket and work his way up.
Greg waits outside at night and waits for someone to walk by to take money from them.
Greg gets more than enough money and can buy his own sneakers.
It is not a sustainable way of making money so Greg will have to keep doing it.