Strongly disagree.

Whether you give me capital at a 1% interest rate of a 50% interest rate; whether you buy 1% of my company for $1,000 or 1% of my company for $100,000,000; are independently determined by each provider of capital. Collusion would be all banks working together to only provide me a loan for 30% interest even if it's obvious I can pay it back.

The use of capital is irrelevant to the question of collusion for providing capital. That's like saying all the workers on a factory line are inherently already colluding because they work towards producing the same car.