Because the problem is complex and your clear, simple solutions has at least 3 knock-on effects, one of which will make the original problem worse. And the other 2 will cause new complex problems in 10 years time.
The clear, simple solution to “X is to expensive” is “Declare a cheaper price for X by government fiat.”
By the time you have compensated for the knock-on effects, regulated to prevent cheaters, and taxed to pay for costs, the solution is no longer simple.
Because the problem is complex and your clear, simple solutions has at least 3 knock-on effects, one of which will make the original problem worse. And the other 2 will cause new complex problems in 10 years time.
The clear, simple solution to “X is to expensive” is “Declare a cheaper price for X by government fiat.”
By the time you have compensated for the knock-on effects, regulated to prevent cheaters, and taxed to pay for costs, the solution is no longer simple.