The only way to make these chameleons (pretend to) care about an issue is to make the general public (aka voters, source of their wellbeing) care about the issue.
In fact I would say that it's impossible to expect anyone to understand enough to know what they're legislating. Aside from being a powerful libertarian argument against the excessive involvement of government, I think it shows that we have to figure out a way to work around the fact that congressmen don't understand everything that they're in charge of, rather than trying to remedy it.
I'll leave you to find your own references to get a detailed picture, but in short two basic forms of organizing do a lot of the work: big teams/staff for each congressman to help out, and special interest committees and caucuses. On top of that at least some take the idea of "representation" somewhat seriously, so if they need to know about a topic they're not experienced in, they tend to meet with supposed experts in those topics (which can come from a dedicated pool, lobbyists, state university department, and occasionally private industry owners or high level employees) for information and sometimes policy recommendations.
No. The majority of them don't even understand what data is being collected, how it can be used, or the technology behind any of it. Until the people in office change, the idea that our representatives can or will protect us is toothless and spineless.