Still ants have been around since the dinosaurs, I am not sure if the era of humans will last that long
But seriously setting ego aside does not mean we become plants, we all are still unique and have certain gifts we could use to achieve greater goals than individuals could achieve. Companies are an example that could still last without the monetary foundations, people would join the organisation that suits them the best.
I too wonder if we can last as long as ants or even lasts as long as dinosaurs. At best, we are merely hundreds thousands of years as modern human. 100 million years plus for dinosaurs looks like eternity comparing to 100k years. As we speak, we are looking down paths in our civilizations some with clashes that likely end with dead-ends.
Not to be argumentative, back to ego for a moment before going back to disruption - ego is part of emotion. Some emotion get in the way of inter-human cooperation. Ego is an emotion that can be both positive and negative. Ego helps an individual reach higher goals.
Ants too can cooperate - much more so than human forming companies/corporations. Army Ants for example are organized, size in the millions, and each group with their own designated function. Ants are not known to have emotion. We don't know of ants fighting another ant because it is jealous of another ant having a bigger share of food. We do know of one group (colony) of ants attacking another so as to rob them of their belongings, enslave their conquered. All these bad things could happen without ego. So, I cannot even say that a "pot people" society (as in Invasion of Body Snatchers and not as in pot-smokers) would even be a peaceful society. But within the society, they would be more like within an Ant Colony.
Civility in our society is what stops us from acting on our emotions unchecked. Culture in our society is what sets the standard of what we consider reasonable - including ego driven actions. Our culture has at times seen suicide as a way of dealing with financial problems, so taxi-driver taking the final-exit is not so outrageous - less outrageous than sad.
Disruptive technology is growing at a much faster pace (that is my supposition/gut-feel, I've no actual data to support that). There were times when I was on the receiving ends of the benefit. I was also young and was very insensitive to those at the short end. Then came the moment(s) when I was at the laid-off end of the new tech. I was not in a situation where I have family to feed at those "short end" times, but I recall the stress and pressure. So, I sympathize with those impacted - a lot.