Politicians taking bribes from companies for creating laws is an example of politicians using their power to enrich themselves. Such politicians will use their power to enrich themselves regardless of what system you use, making such people run the entire economy would guarantee a disaster.
What you need is a stronger separation of capital and state.
There is no separation of capital and state in the United States anymore. It's just more "gentle". What we have is "broken capitalism".
We have a system where government figures trade as if they were teenagers on Robinhood, then disappearing through revolving doors to work for the companies they were supposed to "regulate", we have CEOs running companies into the ground while walking away with riches. This ain't capitalism. It's something.
What you need is a stronger separation of capital and state.