I disagree. If they have such a huge difference in rates, there are also differences in their experience, quality, reputation, publicity... If you want to get really decent result you must pay 1000$ for person B, otherwise you'll get what you pay - poor quality, zero revisions, 3 months waiting for the mix and so on... Sometimes there are offers with good quality at low rates, but it's only exception. Therefore, the chain of events would be like this:
1) Person A works for $100.
2) Person B works for $1000.
3) Client X tells Person B they won't pay him $1000 because Person A works for $100.
4) Person B refuses to work for $100 due to huge difference in experience and quality between him and Person A.
5) Client X pays $100 for Person A.
6) After getting final mix Client X was not happy with result at all.
7) Client X is forced to pay $1000 for Person B.
Same thing in all other fields in the market. There are guitars for $1000+ and guitars only for $100. No one would complain about cheap guitars from China that flooded the market
You would just pay what you are able for.
