US healthcare industry buys your financial data to work out how desperate you are and therefore how low a wage you’ll settle for.

One of the big misconceptions people have about economics that is often propagated by plutocratic apologists masquerading is economist, is that the labor market is in some sense Fair because people are free to negotiate without coercion wages according to the law of supply and demand. They use this to rail against things like minimum wages or unions or overtime, etc... they ignore the very basic fact that for a market to actually approximate optimal utility, quite a few factors have to be true that actually aren't in our economy. For example information has to be equal between the two negotiating parties, free from misconceptions, and approximately complete. Secondly the ability to walk away for the two parties have to be approximately equal. The further you get away from these presumptions. Third all people in negotiation including other businesses and workers must be operating in their rational best self-interest, for example if another person looking at this job has irrational hopes of promotion, imposter syndrome, or brand loyalty, they will actually cause a dysfunction in wage negotiations that affects everybody else who undergoes wage negotiations.

Basically none of these assumptions are true in the current labor market and they largely haven't been true since the Advent of big business coming the dominant form of life sustaining jobs.