Well, sometimes I will, but for example take a simple list+form ontop of a database. Instead of building the UI and the database and then showing the stakeholder, who adds/renames fields, changes relationships etc. I will intentionally build just the UI not wired up to database. Sometimes just to an in-memory store or nothing. Then, _after_ the stakeholder is somewhat happy with the UI, I "bake" things like a service or data layer, etc. This way the changes the stakeholder inevitably has up front have less of an impact.
