Collaborative Collateralization in MakerDAO: Feasibility and Implementation

[antidamnation]

I’ve been thinking about the Dai stablecoin and how it maintains its value through over-collateralization. Normally, a single user locks up more crypto collateral than the value of the Dai they generate. But what if two parties could collaborate on this?

Here’s the idea:

Party A wants to use Dai as a currency and puts up $100 worth of collateral.
Party B provides an additional $50 worth of collateral to ensure over-collateralization.
In this setup, if the price of the collateral goes up, Party B benefits from the increased value. Could this kind of collaboration work within the current MakerDAO system? Is there any other system implementing it? And if not is it possible to implement such a system?