It is an investment, yes. And donations have been missing, yes.
However, history cannot be ignored.
If I have a leaking pipe under my sink, I pay to fix it. I don't just let it be and hope it improves on its own. Over time, that leak will get worse, and it will start to cause water damage, etc, etc... and eventually the cost will grow to fix the problem. Instead of fixing a washer, it might be replacing the wood under the sink, the subfloor, and the ceiling of the room below.
Rutgers neglected its programs for far too long, and now are trying to pay to fix them - and it's costing far more than it would have (subsidy) than if they had invested all along for the last 35 years.
And if it had invested all along, the donation rate would likely be higher than it is, too.