A debtor who becomes entitled to an inheritance in the six months following the filing of a bankruptcy case must contribute that inheritance to his creditors. 11 USC 541 (a)(5). This is one of only three exceptions to the idea that bankruptcy operates to “net out” what the debtor owns and what he owes on the day the case is filed.

As Craig Andresen points out, the contents of a spend thrift trust are not property of the bankruptcy estate, and not, therefore, available to pay creditors in a bankruptcy case. So, if that inheritance comes to the debtor in trust rather than outright, it does not go to creditors.
As awkward as it is, I try to ask prospective debtors if there is any likelihood that they will inherit money in the near future. If that is a possibility, I suggest that the client talk frankly with the source of that inheritance about making any gift to my client in trust, with a spendthrift clause.

While most Americans are incredibly private about their financial troubles, I doubt that anyone leaving money to their loved ones at their passing wants that money to end up benefiting the credit card lenders. It may require that the client swallow their pride to admit to the depths of their financial woes in the process of enlisting the help of the testator to make their gift effective. It requires consideration.