One of the most common refrains from the political left and the media is that, regarding the economy, conservatives advocate for unchecked freedom for big business to do whatever it wants to do, and for no government interference with business at all. These assertions stem from a fundamental misunderstanding of the nature of conservatism.
For the conservative, the issue comes down to the proper role of government. To have no government at all is anarchy, and certainly no conservative would argue that. So the question is not whether or not there should be government involvement (there should), but what level of government involvement is appropriate.
When we look at the biggest financial scandals of the last decade (Enron, WorldCom, Fannie Mae and Freddie Mac, etc.), they all have one thing in common. At some point, whether through active complicity or negligence, government played a huge role in allowing the scandals to occur. And with every scandal, it becomes an excuse, or rather an imperative, to increase the level of government involvement to keep it from occurring again.
Some of the major scandals have occurred because the regulatory oversight assigned to one government agency or another was either inadequately enforced, or government employees were co-opted into the fraudulent scheme. Others occur because our statutory and regulatory law has become so complex that it is inevitable that a crafty thief will be able to find technical loopholes that fulfill the letter of the law while being contradictory to the clear intent of the law. Either way, we continue to add layer after layer of government bureaucracy, regulation and complexity, and yet the scandals keep getting more and more expensive. That is because the more complex the law, the easier it is to find a technical Get-Out-of-Jail-Free Card.