A government agency employs normal average developers etc.
They offer non-stellar wages in an economical backwater so has quite a boost on the local economy and gives programmers wanting to live more rurally employment opportunities, but I imagine today a lot could be remote too.
And it works great. No thrills but functional. Excellent value for money.
(The uk's gov.uk websites that I've had to interact with have a similar look and feel if a less integrated feeling; I don't know how they are developed.)
I've seen and known the the outsourced contractor systems in normal companies from the big names and all have always been an unending disaster. The goal is to 'grow the engagement' not finish. The incentives that keep it going in normal companies are not really about getting a good system quickly.