No. The bare minimum is what the customer requirements state. You deliver to the customer requirements. You don't deliver less, because that wouldn't meet the requirements. You don't deliver well beyond the requirements, because you'll guess incorrectly which direction to build.
If you come in ahead of schedule and below budget, looking around furiously for more value to add for the customer, then ask the customer what else they need. Don't just build more random stuff just because you have time to do so.
How this nonsense of "the bare minimum" somehow being less than what was promised comes about I'll never know. The bare minimum is what was promised. That's how promises work.