Online License

I got an online license today for my trip to Idaho. When I was filling
out the online form, they asked for my SSI#. After I put it in, a new
page opened that had all my personal information already filled in
including full name, address, phone number, drivers license number, age,
weight etc. etc. I've purchased alot of stuff online and I've never come
across this before. They weren't using their own past records because
I have never purchased an Idaho license before. It kind of spooked me.

Were they able to immediately obtain this information because they are a
government agency or can all vendors access this information if they choose?

Willi