Usually that's handled by political specialisation (committees? I'm not sure about the US word for this). Senator A knows the healthcare, while senator B knows the military systems.
I'm not sure exactly how that's a solution. The free market is already the powerful against the weak (technically all vs all), is cheerished to be going for money and power and the control is the consumer. Aka the random guy on the street that needs to get the same information as that overloaded senator to make informed decisions, while working at the same time (unlike the politician, where this kind of information gathering is part of his job). It's not like the politicians makes the industrial lobby corrupt.
It's the work of media and population to ensure that the politicians doesn't coddle up to the powers in the industry. Dropping the politician is a far cry from a solution.
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