Just asking here - this should not be construed to mean anything other than an expression of curiosity.
In the construction of kitchen cabinets, I've seen a process where the boxes are built without the toe kick - flat bottomed if you will - and 4" shorter than normal. Then a frame of 4" x 3/4" plywood strips is placed on the floor, leveled, and fastened. The boxes sit on this frame. This has the advantage of easier box construction and only having the frame to level rather than each individual box. Speedier installation, I should think.
Anyone ever tried this method in a kitchen? It is the method I used for my bedroom built-ins and, IIRC, it went pretty well.