This 100% and it is not just super risky things like "exploring space".
If you have ever PIed on a government contract you will know that the program manager will almost certainly deviate from what is in the contract. They will call unbudgeted out of town meetings, ask for unbudgeted reporting, demand unbudgeted changes to the deliverables.
As a contractor working with the government, "cost plus" is the only sane option. The program manager is not going to have the bandwidth to renegotiate (and bid out?) in the almost certain event of a change in scope.
The alternative to "cost plus" is defensive billing where the contractor attempts to devine and account for extra non-contracted work. That lead us in the past to $1000 hammers and no-one liked that either.
If you have ever PIed on a government contract you will know that the program manager will almost certainly deviate from what is in the contract. They will call unbudgeted out of town meetings, ask for unbudgeted reporting, demand unbudgeted changes to the deliverables.
As a contractor working with the government, "cost plus" is the only sane option. The program manager is not going to have the bandwidth to renegotiate (and bid out?) in the almost certain event of a change in scope.
The alternative to "cost plus" is defensive billing where the contractor attempts to devine and account for extra non-contracted work. That lead us in the past to $1000 hammers and no-one liked that either.