Importance halves every 2× compute (÷2 per doubling), so it crowds the cheap end — but for this system the 3k–5k block is floored to 0, so that weight is wasted.
The Expertise Rectangles
Each measured budget is a rectangle: width = its weight, height = its score. The shaded staircase is the expertise score. The floored block (3k–5k, ≈40% of the weight) sits at zero height, so it adds nothing.