Earlier quoted context omitted.
A 100- and 500- year plan is ludicrous on it's face. They don't even credibly hit their 5 year plans a lot of the time. The idea of planning something so large and complex so far into the future seems like wishful thinking at best.
“In preparing for battle I have always found that plans are useless, but planning is indispensable.” — Dwight D. Eisenhower "No plan survives the first shot of the battle". So, sure, the plans will likely not survive in any detail even a decade from now. But the fact that they are making plans, attempting to understand the considerations of those future generations, understand what strategic goals need to be worked o…
Most of those jobs outside of a few narrow categories were lost to automation. We make more steel, aircrafts, and cars than ever but with far fewer people.
China's history of planning has led to tons of misallocation of resources, and I'm not sure I'd want to emulate that.