"The government" is multiple agencies and departments. There is no single computer system, database, mainframe, or file store that the entire US goverment uses. There is no standard programming language used. There is no standard server configuration. Each agency is different. Each software project is different.
When someone says the government doesn't use sql, they don't know what they are talking about. It could be refering to the fact that many government systems are ancient mainframe applications that store everything in vsam. But it is patently false that the government doesn't use sql. I've been on a number of government contracts over the years, spanning multiple agencies. MsSQL was used in all but one.
Furthermore, some people share SSNs, they are not unique. It's a common misconception that they are, but anyone working on a government software learns this pretty quickly. The fact that it seems to be a big shock goes to show that he doesn't know what he is doing and neither do the people reporting to him.
Not only is he failing to understand the technology, he is failing to understand the underlying data he is looking at.
Yeah, let's do nothing and let the children of people we don't like die. And in the meantime, let's put other particularly vulnerable - like the immunocompromised - at risk. But we'll sure show a handful of people how right we were the whole time.
You might want to rethink your moral compass.
Sometimes, the best you can do is explain a bad decision when you see it. The people who really want to do it will ignore you. The hope is to get the people on the fence to not do it. You won't get them all, but if it saves even one child, it's worth it.