It is because of the ancient computer systems that are still not replaced. They use a software from 1959 and are struggling to find experts.
An Ancient Computer Language Is Slowing America’s Giant Stimulus
The Covid-19 pandemic has exposed aging, inflexible computer systems at the heart of the U.S. economy -- and a shortage of experts to fix the problem. This is slowing the government’s effort to get billions of dollars in stimulus checks to millions of newly unemployed citizens.
www.bloomberg.com