That is not what I said. The question is how much real wealth creation has increased since 1986.  Real wealth is created when goods or services are produced at below their production costs as determined by free markets, resulting in a profit.  

Native corps do much of their work providing low value services (hotels for example), which are not rigorous supports for an economy.  Service industries will greatly suffer, just as they did in '86.  Also, they contract for governments, which does not create activities outside of what would be produced otherwise.  This is especially true in the since that many of the contracts are dependent on at least partial state funding, which will be short in coming.

Native corps might "buffer", but how successful they will be in truly deferring economic decline is yet to be seen.  Native corps are involved in some wealth producing projects like Red Dog or the Donlin Project.  

Many would consider 8a contracts welfare, however.