Connection lost
Server error
Legal Definitions - Mathews v. Diaz
Simple Definition of Mathews v. Diaz
Mathews v. Diaz (1976) was a Supreme Court case that upheld a Social Security Act provision requiring non-citizens to reside in the U.S. for five years and be permanent residents to qualify for Medicare Part B. The Court affirmed Congress's broad authority over immigration policy, allowing it to make distinctions between citizens and non-citizens, and among different groups of non-citizens, regarding eligibility for federal benefits without violating due process.
Definition of Mathews v. Diaz
The Supreme Court case of Mathews v. Diaz (1976) is a landmark decision that affirmed the broad authority of the U.S. Congress and the President over immigration policy, particularly concerning the eligibility of non-citizens for federal benefits.
In this case, the Court considered a provision of the Social Security Act that required non-citizens to have resided in the United States for a minimum of five years and to have been admitted for permanent residency to be eligible for Medicare Part B. A group of non-citizens challenged this requirement, arguing it violated their constitutional right to due process.
The Supreme Court unanimously ruled that these requirements were constitutional. The Court's decision established several key principles:
- Congressional Authority over Immigration: Congress has extensive, or "plenary," power to create laws governing immigration and naturalization. This power allows Congress to make distinctions between citizens and non-citizens, and even among different groups of non-citizens, regarding eligibility for federal benefits.
- Due Process for Non-Citizens: While non-citizens are entitled to the protections of due process under the Fifth and Fourteenth Amendments, this does not mean they must receive all the same advantages and benefits as citizens. The Constitution permits Congress to treat citizens and non-citizens differently in many contexts.
- Rational Distinctions: Congress can establish rational criteria for determining which non-citizens are eligible for federal benefits. The Court found that requiring a period of residency and permanent resident status was a reasonable way for Congress to determine a non-citizen's connection or "affinity" to the United States before extending certain benefits.
- Limited Judicial Review: Courts generally exercise narrow review over immigration policy decisions made by Congress. The judiciary is reluctant to second-guess policy choices in this area, recognizing that immigration law often involves complex foreign relations and requires flexibility best handled by the political branches of government.
In essence, Mathews v. Diaz confirmed that Congress has the power to set conditions for non-citizens to receive federal benefits, and these conditions do not necessarily violate due process as long as they are rationally related to a legitimate government purpose.
Examples of Mathews v. Diaz in Practice:
Federal Student Aid Eligibility: Imagine a student who recently arrived in the U.S. on a temporary visa and has been living here for two years. They apply for federal student loans or grants to attend a university. However, federal regulations, consistent with the principles of Mathews v. Diaz, might stipulate that only U.S. citizens, permanent residents, or certain other eligible non-citizens (e.g., those with asylum status) who have resided in the country for a specific duration are eligible for such aid. The denial of aid to this student, based on their immigration status and length of residency, would be upheld as a rational exercise of congressional authority to define eligibility for federal benefits.
Emergency Disaster Relief Programs: Following a major natural disaster, the federal government establishes a program to provide emergency housing and financial assistance to affected individuals. The program's guidelines specify that only U.S. citizens and lawful permanent residents are eligible for certain types of aid. A non-citizen who was living in the affected area on a temporary work visa, despite suffering significant losses, is denied assistance. This scenario illustrates how Congress, through federal agencies, can create distinctions based on immigration status when distributing federal benefits, and such distinctions are generally considered constitutional under the precedent set by Mathews v. Diaz.
Federal Employment Opportunities: A federal agency announces job openings for a specific government position. The eligibility requirements state that applicants must be U.S. citizens or lawful permanent residents who have resided in the country for at least five years. A highly qualified individual who is a non-citizen with a temporary visa and has only lived in the U.S. for three years applies but is deemed ineligible. This reflects the government's ability, affirmed by Mathews v. Diaz, to impose specific residency and immigration status requirements for access to federal employment, which can be seen as a form of federal benefit or privilege.
Last updated: November 2025 · Part of LSD.Law's Legal Dictionary · Trusted by law students since 2018