Oh, the issue with the lump sums is that you have a series of lump sum programs.
For the partially disabled, like my son, it's just a lump sum; that's it. Then you have lump sums in the cases of people who are discharged from the military and they get some earning loss and some training. Then you have the severely disabled, as we were talking about, who have ongoing benefits. In each of those categories the lump sum is a different payment, so what we're doing here is calling lump sums one term when in fact it has three different meanings. The lump sum for my son is the only payment he gets. A lump sum for a moderately disabled person, say 40%, is part of a program of reintegration into society. A lump sum for a severely disabled person is just part of an expanded benefit program.
When you say “indexed”, I'm not 100% sure what you mean. Is it to increase the lump sum as it goes up? The issue is whether you want to have a lump sum, for instance in the case of my son, that is equal to what the court system would give out for a liquidation and liability and then apply that to a severely disabled soldier and then add on your other streams of income on that too.
You're going to run into problems here, because you're going to have double the compensation. That's the problem with the lump sum payment. It doesn't work in some cases, and if you make it too big, it's going to be too much in other cases.