the emerging market fund would just take over the outlook and administration of the TSP

This is absolutely ridiculous. It would "take over"?
Come on, now.
a) The choice of whether or not to put ANY money in emerging markets would be wholly up to the individual
b) Even if you're one of those ninnies who thinks that default choices are hugely important, you could easily mandate that by default NO money goes to the emerging markets fund
Not to mention that prior to this you were talking about political interference and "international implications"

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