The four accounts on this proposal made extrinsics in the past that lost funds due to bugs in the runtime at that time.
The extrinsics were: 1, 2, 3 and 4
You can see that each has a polkadotXcm.Attempted event which shows that it failed, however, there should be a polkadotXcm.AssetsTrapped event too. This was due to a bug that the assets were not trapped and therefore lost. This bug was present in the version used in these extrinsics, 1.1.0 of Kusama.
The accounts attempted to cross-chain transfer all their funds and didn't have enough to pay for delivery fees, since they were taken from the account itself.
This was fixed in version 1.1.2, after changes from PR 3085 were included.
Since these funds were lost due to a bug, they should be reimbursed, while extrinsics where assets were trapped (not included in this proposal) can be reclaimed.