That’s why they have lobbyists…

In theory there are also panels and advisory boards for technical things. Of course, the same monied interests who pay the lobbyists also try and get people into those roles. Heck, I would wager a good chunk of the lobbying is in the form of a non-governmental policy advisory group.

Elected representatives don’t need to be experts in everything, but they should be able to get technical advice. Unfortunately this is where much of the lobbying comes in.