No, I didn't think my way into it. I initially thought myself into thinking efficient government was possible, then I watched the government callously destroy friends and family. Watched them be eminent domained without compensation. Watched their businesses and retirement plans capriciously taken away, often for no practical reason.
These real world observations demonstrated my theoretical model was flawed.
I would argue it is you that has not seen the balance sheets, absurdly high line items, or worked for a government contractor - else you would 100% agree with his stance on taxation.
A huge chunk of government spending is a horrendous waste/scam and you will likely never understand this unless you take the initiative to look at the spending breakdowns or actually spend a bit of time at a government contractor.