If job hunters complain how difficult it is to get a job, well, this is because it is never easy to find a good worker. A company will need to sort out job applicant they have every time they post a new opening for a position to be filled in a company.
It is however rewarding when a company actually finds one employee that they feel they can trust. Good employees are expected to perform and also bring something to the table. someone who can bring in an out of the box idea in order for them to keep their jobs for a longer period of time. This is why pre-screening job applicants is a very important task in order to find a good person right fit for the job.
Here is an infographic of the statistics about how long a hiring process take before a company finally hires someone:
As you can see, the length of interview process takes a longer time, this is because after an interview a screening or background checks are mostly required by companies who wants to hire a person with a good reputation and without criminal record.
That way they can almost guarantee the quality their company produces is a product made by a trust worthy employee.