Also - if corporations succeed in becoming completely independent of labor, it will happen regardless of taxation. We shouldn't say to corporations "you must hire people or else we won't have a tax base". We should say to corporations "since you no longer require humans, we will change the way taxes are applied."
A century or more ago, they could see how rapidly productivity was increasing. It's only increasing yet faster now. Economists then predicted people would have enormous leisure time. While they have significantly more, it's not like we have abandoned work. Instead those productivity benefits go increasingly to shareholders and not labor.
So we will soon face a precipice that will disrupt the status quo. And the people will eventually triumph because collectively we are the governed.