I could hire excellent tutors to make myself more intelligent

As far as I know you can't raise your IQ significantly by training.

There is a lot of data about how much can you raise your SAT/GRE/LSAT/etc. scores by tutors and training and that amount is limited, plus most of the gain is test-specific and not properly a rise in g.

More to the point, I could hire smart people to think of good ideas for me

That doesn't buy you IQ, that buys you solutions to problems. That's a different thing.

Hire some psychologists to figure out what experiences causes people to have them, then buy those experiences.

Let's see how that works for achieving moksha (= becoming enlightened) :-D