There are always going to be comments about an amount on wire that is more than the component being out of perspective. There is only one perspective here and that is that if a power cord that costs thousands more than the component lets everything the component is capable of be revealed it is not a waste of money.
Say you are comparing a $20k CD player to an $8000 CD player, and say that as is often the case the $8000 one is actually capable of outperforming the much more expensive one. Would it be a fair comparison to use a $1500 cord on the cheaper one and a $3500 one on the expensive one? No, if the expensive cord is better it will give the expensive CD player an unfair advantage. Now if the same cord is used and the cheaper CD is actually better you have an $8k component and a $3500 cord that is a performance bargain compared to the $23k of the one that doesn't sound as good.
Middle of the road excellent equipment paired with extraordinary cable is going to sound better than extraordinary equipment with middle of the road performance cable.
Say you are comparing a $20k CD player to an $8000 CD player, and say that as is often the case the $8000 one is actually capable of outperforming the much more expensive one. Would it be a fair comparison to use a $1500 cord on the cheaper one and a $3500 one on the expensive one? No, if the expensive cord is better it will give the expensive CD player an unfair advantage. Now if the same cord is used and the cheaper CD is actually better you have an $8k component and a $3500 cord that is a performance bargain compared to the $23k of the one that doesn't sound as good.
Middle of the road excellent equipment paired with extraordinary cable is going to sound better than extraordinary equipment with middle of the road performance cable.