I think this is different than Malone's bulkhead concept. My understanding (based on I don't remember where this was mentioned, maybe a call, maybe a letter, maybe the AGM) is that they're keeping the option to use a bit of leverage to be competitive on the bigger deals.
The reason is that most buyers of larger VMS are private equity, and they'll put 5-8 turns of leverage on anything that moves, so they can pay much higher prices than if CSU tries to buy without debt. So to be able to meet their hurdle, they're probably putting a few turns of leverage on it--I don't doubt they're a lot more conservative than PE, so I wouldn't be surprised if it was just a few turns.