Great Video.

1149630 Between having a currency that is still gold (We'll assume that), and having a citizenry that is largely self sufficient, (don't see big trains of food being shipped in, or work camps to bring in workers from outside the community), I don't see Equestria having that problem.

Conclusion: Equestria's appearance on Earth, coupled with an inability of Earth to invade (See: Discord, the god who puts the mad in MAD), would spell disaster.

Yep, entertaining and informative.