Wainscoting over unfinished earthbags - would this work?

So, I like the look of wooden barnwood-plank wainscoting to break up the plaster walls inside an earthbag home. Here's what I'm thinking:

-Build earthbags up to the height I want the top of the wainscoting. (I'm thinking straight walls at this point.)

-Lay planks between courses so they jut out from the earthbags by several inches; hold them down with the weight of subsequent courses

-Plaster the interior wall only from the planks up (thus saving a ton of time)

-Once the flooring is in, nail a piece of wood to the floor parallel to the wall to attach the wainscoting, and nail a smaller strip of wood underneath the top plank so it leaves a lip at the front.

-Nail the boards to the top and bottom. Add insulation to the space as I go, either clay slip or spray-foam or something else... honestly haven't decided yet.

-Add a baseboard.

Would this work? My thinking is that the void behind the wainscoting could be a really handy place to put piping, electrical wires and boxes, and so on. I could even make a door/access panel out of a section of the boards if I needed to access something.

My concerns: would the weight of the plaster above the top plank make the wall top-heavy or put too much pressure on the plank? And would leaving the earthbags unfinished on the inside of the wainscoting cause any problems?

I'm a newbie to all this, so constructive criticism and/or gasps of horror at my idiocy are welcome. :p

I believe your idea will work.
I have seen it many times in stone or brick homes.
The plaster above the woodwork will not be too heavy for anything, it will attach to the bags,
If you create a wainscott say 6 inches out, you will have a great shelf for many things and the added insulation say, rock wool will help a lot.
Running services in the space is excellent

Sarah, your design sounds very good.
A baseboard that is screwed on could cover a horizontal raceway for wires and pipes.

I'm not what side of the building envelope should be insulated for earthbags construction in your climate, or if the thermal mass of earthbags is compatible with insulation at all.