Are all costs associated with a wrongful death lawsuit award/settlement flexible?

No, not all costs associated with a wrongful death lawsuit awards are flexible. The only costs that are flexible are non-economic damages. Costs already paid or needing to be paid in relation to a death (e.g. funeral and burial expenses) are usually reimbursed in full, as are medical bills. Additionally, the court may order punitive damages (a.k.a. exemplary damages) to make an example of the defendant and to ensure the same mistake that caused a death does not happen again.