Why do many companies not recruit from outside but through intermediaries now?

Many companies recruit people through intermediaries. The main reasons are:

1, lack of company talent pool: professional intermediaries have a large number of high-quality talents needed by enterprises, and most companies are seriously lacking in talent pool awareness, so they use professional intermediaries to recruit;

2. Reduce the operating cost of the company's human resources department: it is more cost-effective for the company to set up an independent human resources department than to entrust it to an external professional organization for a long time. Save money, save trouble, and leave professional things to professional people;