<p>Because a bachelors in accounting isn’t enough to become a CPA. most CPAs have masters degrees, while finance majors typically work right after their 4 years. There’s also a risk/reward trade off, with accounting being at the lower end. Finance majors, who typically work in banks, have more money at stake (both to lose and gain). </p>
<p>So in short; because they do different jobs</p>