A budget nobody enforces is a wish. We put ours in CI so the build fails rather than the launch.
It is not a component library, and it is not a Figma file. It is an agreement about how decisions get made when we are not in the room.
Retrofitting contrast, focus states and landmarks costs more than doing it in the design phase. It is not a moral argument, it is a budget one.
Every measurement we have ever taken says the second slide is seen by almost nobody. The first slide is the page.
A single figure implies a certainty nobody has at the brief stage. A range with named assumptions is more honest and, oddly, easier to sign off.