Leveling a MH v/s 5er

To try and explain this better, lets assume that instead of steel pads on your jacks there were wheels on the rear jacks. So we park on a slope and we lower the rear jacks with the wheels until we lift the rear tires off the ground and as soon as the tires come off the ground the motorhome is level. Once the rear tires are off the ground what is the motorhome going to do? Is it going to stay in place because it's level even though the ground is not, or is it going to start rolling downhill? Hopefully we all realize it's going to start rolling down hill. The same pressure that causes it to roll down hill is the exact same pressure that is going to be on the jacks in a lateral direction when they have steel pads. I'm not as good as JetAOnly on the math, but his math looks good to me. Can the jacks handle several hundred pounds pressure pushing sideways on them? Clearly they can handle some lateral pressure, but at some point they will fail. I personally don't want to find that point.