Exactly how does an employer benefit from applicants showing up at the top of the list because the applicant paid for the top position - after the employer paid

Exactly how does an employer benefit from applicants showing up at the top of the list because the applicant paid for the top position - after the employer paid to post jobs and to receive applications? On the applicant side, if you can buy top position when applying for jobs posted on LinkedIn, why can't you buy position in the "searched" database? Is that "less ethical?" LinkedIn is "a little bit pregnant." I've got no issue with job hunters doing what they can to get an employer's attention, but when LinkedIn starts "transparently" selling positioning to job hunters while it's charging employers for access to those applicants... well, like Richard Tomkins said in my column, you start looking like Lance Armstrong.