Final answer:
Prison workers' unions are the group that tends to support incarcerating people in greater numbers due to job security and the benefit to the private prison industry.
Step-by-step explanation:
The group that tends to support incarcerating people in greater numbers is prison workers’ unions. This support can often be attributed to job security and the expansion of the private prison industry, which stands to benefit from a higher incarceration rate. Historical trends show that a 'get tough on crime' attitude in the late 20th century, as well as initiatives like the 'war on drugs', contributed significantly to the current high levels of incarceration in the United States. Additionally, these policies have led to racial inequities, with African Americans being disproportionately affected. Critics of the current system argue that the increase in the prison population is not merely a reflection of better law enforcement but is heavily influenced by social issues such as race, poverty, and a lucrative prison-industrial complex.