If sales drop significantly enough to cause a problem, it won't be because of public out cry against working conditions/employee abuse. The consuming public couldn't care less about retail workers; many of them don't even think of them as human beings. Even organized labor unions won't boycott shopping at Walmart, I've seen countless members with their proud union coats on pushing carts through the stores.
If anything is going to take this behemoth down----which will likely never happen completely, tho we are seeing the tip of some very huge changes in their 'Rome conquors the world' approach----it will be the continued frenzy of on line ordering. Walmart simply cannot compete with that, the way it currently is structured.
What ever happens, good or bad to that company, will have nothing to do with the public's feelings towards Walmart's employees at all.
OP is @WkTpz9f-anc.