The computer systems run by the consulting giant Deloitte that millions of Americans rely on for Medicaid and other government benefits are prone to errors that can take years and hundreds of millions of dollars to update. While states wait for fixes from Deloitte, beneficiaries risk losing access to health care and food. Changes needed to fix Deloitte-run eligibility systems often pile on costs to the government that are much higher than the original contracts, which can slow the process of fixing errors. It has become a big problem across the country. Twenty-five states have awarded Deloitte…