nepotism in the workplace

my boss tends to hire people he's very close with (including his son, niece, and a couple of very close friends). while he may trust them, I often feel like these people aren't actually the right people for the job (if I were in charge of hiring, I'd never pick to hire these people based on their skills and experience). my boss has owned this company for decades and is very set in his ways so I don't see much opportunity for me to change the way he staffs the company. that said, I love the work that I do. any advice?