Scarcity can be intentionally engineered in a corrupt government, and the reason is because they profit from it.
We could have government officials who hold a majority in certain sectors in the economy, and they know that creating scarcity would improve their profit margin, and in corrupt systems where there is no other body to checkmate these corrupt moves, scarcity would thrive and be the order of the day.
That's not even the only reason, they can literally keep people very poor and in trouble, so that they can promise they can be the ones who can save them. So they do not actually have to do good, they just have to keep making sure people stay bad, and then, their buddies, the other party, may take power, and blame each other, in turns.
That's what's going on even in a not poor country like USA, all those democrats and republicans are friends, and one takes power, blames the other, then the other takes power and blames the other and they keep in cycles that way.