"It takes an act of Congress to change the GRR of 14.91%, but not the other rates. "
You also don't get to select out the word or phrase that you choose to interpret and present as the whole meaning of a statement. My statement about Congressional action to change the rate was in relation to the possible need to lower the rate due to having more than sufficient tax revenue to cover the reduced proportions of the entitlements plus the GRR. Congress would need to alter the GRR upward or they would have excess tax money scattered all over the Beltway with no place to put it.
Can't have that, can we?
"It takes an act of Congress to change the GRR of 14.91%, but not the other rates. "
Well, I am glad you understand that is correct. You are still confused about changes to the overall rate though. The overall 23% rate will change (either go up or go down) without Congress acting. The 14.91% rate is fixed by this bill, but the other factors change automatically based on government statistics. You have stated numerous times the 23% rate requires an act of Congress to change (either up or down, it does not matter to this discussion). Do you still think that?