At the Lab, neither Bill Gates nor Steven Jobs would qualify as TSMs. The Laboratory's policy on TSM qualification has nothing to do with the labor market. It is simply an iron clad bureaucratic rule. Anyone familiar with the structured series can tell you that upgrades are difficult to get and that workers are commonly misclassified. And there is never enough money to equalize the salaries of workers who have learned and grown in their fields.
Salaries are about the same for everyone, regardless of merit.
TSMs in some fields are low, but in others, they are overpaid. If market forces are your argument the answer is no. At the Lab, once a manager, always the pay check of a manager, no matter how low the level of the work. This does not reflect the job market. This is bureaucracy.