One major argument against paying athletes is that they already are paid through their scholarship. As a result, it's important to examine how the scholarships are distributed between the sports. Below is the breakdown of how many scholarships there are for each team in Division 1. There are interesting differences between men's and women's sports as a result of Title IX and the large number of male scholarships that are used on Football. A point of emphasis is that Football and Men's and Women's Basketball can only give out full scholarships, however, the rest of the sports can (and mostly do) give out partial scholarships. As a result, many athletes on those teams are offered a partial scholarship and only the very top athletes on each team are given a full scholarship. All of the scholarship limit data can be found here.
* - indicates sport that can only allocate full scholarships