I don't think its some kind of sabotage and saboteur are clocking 24/7 to bring to IK. normal stages have 1-1.5 feet high platforms with a grid of wooden planks underneath. it seems that stage wasn't made for this much weight and crumbled.
Some people are raising concern about safety and security, which is not an easy task. You need a master craftsman as monitor , where ever wood, aluminium , rod iron strutcture is placed. A very good electrician , having solid knowledge of safter & security is required too. Besides this, a dedicated Safety & Security Response team is on the list too. You also need to weigh in every possible scenario, which is not possible in public gathering not put up by PTI.
Besides above, who can stop the senior members from coming up to stage.
So, best approach is, instead of trying to fly high, remain on the ground, meet people but instead of a swarm, a group of 3-5 is more then enough. Keep 01 medic, 02 BGuards, 01 Transport specialist & 01 Comm expert nearby. Above all, have them trained to work as a well oiled machinery to overcome any unfortunate accident.