Rocket, remember... With the people who believe it's the rich causing all the problems, reality is not of concern. The "left-anarchists" and socialists (the ones who aren't just practicing the same shit on a different day with a different label, anyway) just want to blame people with any real resources or material wellbeing for the problems of the rest of people. They refuse to accept evidence of societies doing very, very well at all levels when they have economic freedom. They refuse to accept that redistribution programs destroy the production infrastructure. They refuse to accept the fact that graft comes from redistribution schemes.
There's an additional impact if the regime is primarily commie. Zim might be one of the places I once saw a report on. In many of these 3rd world nations, if someone seems, even seems, to be doing too well for themselves, the goons come in, take everything he or she has, and bulldozes it. At this point, it can be even if your ramshackle hut seems to be a little oversized and your equipment doesn't suck in some places. Even above taxes, inflation, anti-investment. If government comes in and destroys everything you have for doing too well, you don't even try. There's no point if you'll never get anywhere.
Frank, it is a bit naive. These people aren't returning to a tribal way of life. Their government is systematically destroying them. Zimbabweans are refugeeing across the planet because their home sucks. They don't want it to suck. These aren't people returning to a tribal way of life. These are people who know nothing of farming, who if they knew anything about farming have no equipment because it's been destroyed, who are getting no financing from anywhere. Who if they even got anywhere wwould probably have it confiscated from them. Most of the planet wants an easy modern life if they get the idea of what it is. Subsistence farming is hard, tough, unrewarding work. The only one it benefits to have most of the population performing it is a government that has modern arms. As long as they can keep that variance in levels, it ensures that there's a large population incapable of overthrowing the rulership. The only benefit to the situation is that it's not sustainable in the long run. Eventually the troops aren't getting paid because there's no money to pay anybody. No food. No goods. No services. Their lives suck along with the populace's. It's one reason the dark ages were a long period of no or negative advancement. And Zim is engaging in a modern version of feudalism. Only their "nobility" is revolting faster. Zim soldiers are rioting at the banks because the currency is worthless.
In short, the soldiers wouldn't have to be pillaging, killing and raping people so much if it's what they want.