Hiring is the most important function in any company, full stop.
If they aren't good at hiring, well then they shouldn't be running a company. There are no excuses. If HR aren't up to the task, then they should be replaced, and so on up to the level of the CEO, until whatever incompetence has been flushed out. Shareholders have to demand this.
A company not being able to hire is just as ridiculous as a restaurant not being able to serve food.
If they are receiving a flood of applications which is hard to sift through, they are already doing everything wrong. Shareholders have to nuke these kind of people.