Yes, Republicans(Conservatives) need to respond to “the rich...the wealthy” with; It is none of your business how much money anyone else makes. And follow up with; How is that any of your business?
I think it is better to point out that there are simply not enough rich people to pay for the gravy train and thus the money has to come from the taxpaying middle class.
A good example is the new CAFE standards that will raise the price of new cars $2,000. That is how this social engineering fascist stuff will get paid for and every taxpayer will tax a hit.