I feel it is unethical and should not be done. Even if they are willing to pay for the inflated bids that does not make it ok. Just because they have deep pockets and can afford to over pay for these card/s does not make it ok and it hurts the rest of us collectors who do not have $$$$.
These crazy prices have not only and affect on high end cards but i think we can see that even mid grade cards are influenced by these practices.
I hope this insanity will come to an end soon so the real collectors can continue to enjoy this great "Hobby".