He also contributes his labour, he is frequently underpaid because of his noncitizen status and because he is from Bangladesh he has to have his own medical insurance until he jumps visa hoops. Those visa hoops are also expensive and people from countries like England don't have to jump some of them because they have a Medicare reciprocity agreement in place. There are other challenges too.
Make no mistake, Australia scrapes every cent it can from foreign workers and still complains about them sending their families remittance.