As bottomless as their supplies for the money printer, so long as the dollar maintains any value.
They either enact what they want with infinitely printable currency or crash the economy and use the ensuing chaos to rebuild the world as they wish. Heads they win, tails we lose. (And in this metaphor landing on the edge would be the slim chance that they get guillotined by angry revolutionaries after they push things too far.)
To answer your questions in order:
They either enact what they want with infinitely printable currency or crash the economy and use the ensuing chaos to rebuild the world as they wish. Heads they win, tails we lose. (And in this metaphor landing on the edge would be the slim chance that they get guillotined by angry revolutionaries after they push things too far.)