Explain why after spending 10 years in school my tax burden should increase by 30k (making it an effective 60% rate not counting 10% sales tax in CA) to give to able bodied people who choose not to get off their ass. I guarantee you society is better off letting me keep what I earned rather than giving it to a completely untested individual. I didn't work my ass off for you.
PS: I hardly ever meet any of those "able bodied people who choose not to get off their ass" - they mostly show up in discussions like these - and I suspect they're a tiny minority. Let's not adjust policies to punish that tiny minority if, in the process, everybody else gets punished too.
How do you arrive at this?
I don't see where you're getting that. Presuming the numbers haven't changed since you commented, it looks to me like taking away half of every dollar earned.
As for a $4k tax being "crippling to a good chunk of them" -- no, you misunderstand the nature of BI. If we're paying $20k worth of BI in this scenario, then the mean income should be about $40k (since a good level for BI -- in basically any economy -- is about 50% of the mean). We could then support a flat $20k/person BI with a flat 50% earned-income tax. This means that the payments and receipts, per person would look like this:
As you can see, people making the mean income or less would make nothing at all. People making moderately more than the mean income would pay a little bit, but no more than they currently pay to support benefits programs. The only people paying a lot would be the people who could afford it.