Digital Finance Architecture for the Public Sector: Redesigning U.S. Tax and Fund Distribution Systems with FAST™ and DFRA™

Public sector finance in the United States is at a critical juncture. The tax collection and fund distribution processes that underpin federal, state, and local governance were designed for an earlier era, and today’s complex, high-speed digital economy exposes their limitations. With trillions of dollars flowing annually through these systems, inefficiencies and fraud are no longer minor inconveniences—they are systemic risks that erode public trust and weaken national resilience. In 2022, the U.S. Government Accountability Office reported $247 billion in improper payments across federal programs, while pandemic relief initiatives such as the Paycheck Protection Program (PPP) saw unprecedented fraud losses exceeding $100 billion. These failures highlight the urgent need for an architectural redesign. This paper argues that tax and fund distribution must now be treated as critical national infrastructure. Beyond modernizing legacy systems, the U.S. requires a digital-first, fraud-resistant, and future-ready financial architecture. Frameworks such as the Finance Architecture Strategy Technology (FAST™) and Digital Finance Reference Architecture (DFRA™) offer structured approaches to embed compliance, transparency, and scalability into the core of financial operations. By leveraging cloud-native enterprise platforms like SAP S/4HANA Public Cloud, integrating AI and robotic process automation (RPA), and preparing for post-quantum cryptography (PQC), the U.S. can build an ecosystem where every dollar collected is traceable, every disbursement transparent, and fraud minimized by design. The contribution of this paper is twofold: first, to diagnose the structural weaknesses of U.S. tax and fund distribution; and second, to propose a framework-led, architecture-first redesign aligned with national priorities of resilience, accountability, and citizen trust.