I have no idea why you decide to post a lecture on how you believe the economy works, but... thanks?
Only your last sentence has any relevance to my post, so we'll go with that. Taxes. Fine, taxes is the answer to where the money will come from. Except in the US, we are already deep in dept, so we still need to raise taxes/cut cost BEFORE we even get back to even. THEN we would need to raise taxes even more to implement UBI. Quick math: $500/mo for 262 million adults would be $1.5 TRILLION dollars. Last year corporate/income taxes totaled around $3 trillion.
So, are you still sure 'taxes' is the answer you want to go with?