You are blaming unethical people for profiting from a flawed system. I would say fixing the system is a easier problem, then fixing humanity as a whole.

For instance, what are the consequences for the mid level government bureaucrat who accepted the 7$ a tube toothpaste contract? It is obviously a flagrant violation with a paper trail. Even if it is revealed he gets a fully paid vacation every year from the bidding company, how do people even hold him accountable?

The government is involved in so many projects and employs so many people, that your one vote every few years means next to nothing.

Democracy was meant as a safeguard against tyranny. It cannot hold individual people in a vast system accountable very well.

You either split up each department in separate elections or reduce the scope and size of the government such that essential services like law and order get maximum visibility and priority.