This paper demonstrates the influence of economic inequality on system-wide US immigration detention policy and on individual detention decisions. The paper describes how for-profit prisons have impacted the immigration system through promoting wide-scale detention, which has led to increased profitability in the private prison sector and influence over policymakers. Next, it details the mechanisms by which economic inequality dictates the likelihood and length of detention in individual cases, through policies of keeping detention beds full and the use of monetary bond requirements for release from detention. The paper raises troubling issues of democratic governance and the commodification of traditional governmental functions. It concludes with recommendations for reform, including lessening the use of private prison companies for immigration detention, promoting the presumption of liberty in the immigration detention system to push back against large-scale detention, and reducing the use of monetary bond requirements as a condition of release.