That is not a problem as long as TBF only does what is good for bitcoin. But no one can guarantee that, and the way it has been set up almost ensures that it won't, at some point in time.
If wé are are not critical on TBF and their actions, those 6 billion people sure won't be.
And how do you plan on doing that with a foundation that has a legal structure designed to give those with more money a head start ? To be elected you have to campaign and we all know how campaigns work, especially when those future 6 billion people join in on the voting wagon.
If you want a example of how that works in reality, take a closer look at the example Gavin mentioned.
With the Internet we have the power to decentralize politics and we no longer need to elect representatives.
There was no need to add that kind of centralized structure on to the foundation ...Edit: Correction - from the common users point of view there was no need to add that kind of centralized structure on to the foundation.