You guys crack me up. I'd put 2 IEC's on that thing so fast it'd make your head spin.
If the existing power cords weren't good enough Bob wouldn't have used them.
Don't kid yourself. The real reason is IEC's cost more and Bob...well, he's cheap.
When I was there, he always paid for breakfast... a piece of toast and coffee. I picked up dinner, which inevitably was on the higher end of the spectrum.
That said, no man of his considerable talent has been more generous with his time and skills as Mr. Carver. That is worth far more than a few meals.
The Gear... Carver "Statement" Mono-blocks, Polk Audio "Signature" Reference Series 1.2TL with complete mods, Pass Labs X1 two channel preamplifier Signed by Poppa himself, Pioneer PDD 9MkII SACD Player, Yamaha PX-3 Turntable, with Dynaudio 20x2, Pass Labs Xono twin chassis phono preamplifier, Pioneer Elite SC-65, Polk audio AB700/800 "in-wall" surrounds, Oppo BDP-93