You can easily attribute it to laziness. They don't research a topic themselves so whoever makes the best presentation gets the vote. Usually that's lobbyists because they have more money and time and are hired as excellent communicators. Dinner invitations and paid flights in private jets help too.

Right, and the lobbyists are hired, not because the corporations that hire them are inherently evil, but because they are mandated by their shareholders to change costly laws rather than comply with them. I'm not blaming our elected representatives, they are just part of a failing system.

Actually you should blame the representatives. They should be there for ALL citizens and have the greater good in mind not just the narrow interests of some.