I can't think of one government job that doesn't require at least some interaciton with others, whether they are co-workers or customers of the service provided. I'm sure that these simulations are just part of an integrated selection process that involves a review of the resumes, interviews, and other screenings required to hire new employees.
Any technology that can be used to provide a realistic preview of job expectations, as well as realistic, behavior-based analysis fo the applicant's competencies can only help to ensure that a more approriate selection is made. Simulations have been used for years to train employees in essential job skills. Why not use them to evaluate the potential skills of applicants?