Jealousy is exactly what it is. Jealousy of the wealth, the houses, the servants, the position. However, a president would have exactly the same privileges, including police protection for life, just as ex Prime Ministers do. There can be no other motive other than jealousy. We already have a democratic system (not going into the Brexit business on this thread) and therefore the queen is a figurehead. A president would be too, and would cost as much, and have as many privileges. Then there’d be the cost of maintaining them for life, whilst continuing to support the new president. Unless of course, we had just had one president till he/she died. Not much difference really. Jealousy is the motive for criticism.