I love short poems and this is a really interesting one. When I write I tend to cut back to the bare bones, so I would probably cross out exists, it and spill, but I'm also aware that I sometimes cut too much. Entirely the poets choice at the end of the day, but see what you think of
The domino effect
is alive and well;
from poor, middle, upper, elite
slow motion topple going uphill
Interesting to know where the term came from, who is DDE?
Mm, with further thought you may want to choose another phrase for alive and well, as its a fairly common term in speech and may have less impact than another which means the same thing.
I love the last two lines, which create the unspoken question of what exactly is toppling uphill, it could be ideas, hardship,but it could be many things, which I like and it definitely promotes thought.
I love the way it implies, amongst other things, connectedness between different levels of society and the workings of cause and effect between them.
Overall, this is a brilliant short poem and has the potential to really go places. Keep writing!
Edit
I hope you don't mind the minor critical points I made, its only through my enthusiasm for the poem that I do, and I would hate for you to feel bad about them.