"Madcap Mech MK1"
We had certain problems in the lab when thinking of ways to reduce casualties. Armored scout cars have their applications, but are so often stuck by impassable terrain and made useless during close quarters situations. Personal body armor is limited by the weight a soldier can carry while still being able to fight. Shooting the enemy before they have a chance to shoot you is the best way, but your soldiers have already assured us that they are doing that the best they can. We believe this is an important problem-dead soldiers cannot recover artifacts for study.
My team proposed and masterminded alternations and improvements to our prototypical power armored suits, hoping to create something larger, more powerful, and better protected than any infantry soldier we have to date. Without the limitations that tracked or wheeled vehicles have, an upscaled mechanical armor suit could breach with force, provide cover for other troops, and carry weaponry too large and cumbersome for any soldier.
The engineers misread our designs, as usual, and decided to build the prototype twice the size we had planned for. They complained something about "problems of scale" and difficulties in miniaturization, but I suspect they are simply covering up for their egregious mistakes. Regardless, the MK1 Madcap Mech is a powerful large infantry vehicle capable of delivering mobile firepower anywhere on the field, even if it can not longer fit in any reasonably sized UFO or building.