You Can't Buy Someone Else Caring about Your Problems
It seems like you can hire experts to understand and consultants to care about your problems, but someone has to bring the intent and to close the loop.
This is easy: when you give people a huge amount of money to care about your problem, they will. This, of course, does not imply that they will be able to solve them.
> You Can't Buy Understanding of Your Problems
This is less easy, but also possible: spend sufficient money so that highly intelligent people (think graduated mathematicians or theoretical physicists) will organize their life around understanding your problem. Because they are highly smart, they will very likely understand after some amount of time (hey, understanding highly complicated stuff by reading papers is what you do in graduate school).
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So the problem rather is: you are not willing to spend that much money or are far too impatient on people (i.e. you want a "fast solution" instead of someone who really deeply wants to understand everything from ground up as you do when in math research).
You can pay them enough to care as far as they get their last payment. How do you get them to care what happens after that?
Or you can share it by having partners or shareholders.
But prolonged exposition and mutual relationships (even ones kickstarted by selfish, careless objectives such as "Pay me!" or "Go to war for me!") necessarily lead to intertwining of identities. And once you consider something (or someone) a part / extension of yourself, caring follows.
In other words, given enough time and substantial interaction, the lines between "you" and "me" blur. That's just a biological (physical?) observation; cf. parasites and symbionts, nation building, product marketing, leadership…
Of course it's a scale, not a binary care / don't care. A doctor may care very little about a celebrity he knows he'll be interacting with for a year or two, max. But family doctors still exist, too.
IMO it's down to arguing semantics about how "tight" is the causal chain between the cause and effect.
Do you perceive the cause (repeat buying) and its inevitable effect (caring) as sufficiently distinct in time and space? Then I guess you didn't buy the caring, you "built it through repeated interactions".
I personally see that boundary as mostly linguistic, and tend to not draw the distinction.