I have no love affair for the big corporate influence on radio, but the question you haven't defined is: How big is too big?
It is probably not unusual for mom-and-pop stations to carry debt also. We all cluck our tongues at the debt carried by the big consolidators of our era, but if you play accountant for a moment, when you compare debts to profits, compare debts to station sales volume, are Cumulus and CC and the other actually any more in debt that the rest of the industry?
We know about their debt because they are publicly traded companies, and their debt numbers are public. Old Larry Fadedjeans and his wife Molly who are operating the little tea-pot sized station out in Mayberry keep all the info a secret. We don't know how big the loan is down at the bank that Molly's dad co-signed so they could buy the station. Since Larry and Molly aren't public, we don't know how much credit-card debt they are carrying to float the station along, we don't know how many open accounts they carry with local retailers who still run charge accounts.