Why isn't this closed or in ASB yet?
So call it ASB and divide Indonesia into five states to distribute representation.
The Philippines would never have become a single state (hey, now, an entirely different argument! or is it...); it'd likely be three.
With ownership of the Philippines, just assume Manifest Destiny keeps rolling west beyond it and have the U.S. buy Indonesia, territory it, and then divide it into five or more states.
But, the OP stipulates that Indonesia is the 51st state, and you srill have not overcome the political, cuktural, and socioeconomic hurdles inherent in this absurd idea.
Oh, certainly his idea's absurd. I'm trying to make it slightly more conceivable.
No, no, I'm changing the "51st" to "--th" (any number)
So, Indonesia won't have to be a State post-World War 2 (if there's a World War 2, anyway)