Because these companies don't exist. Top companies pay SDE3s and tech leads like 300-400k. Medium-sized companies in high cost of living areas pay directors around that much. No one pays engineers that much. Literally no one.
No, they just don't consider the millions they receive in stock. Given that an intern at Facebook earns $8000 a month plus free luxury rent, do you honestly think a director makes only 70% more in a tech company?
At most companies tech lead means someone who is planning the technical work of a team, but is not the manager. The tech lead is an engineer. So that company has separated manager and tech leadership. Google works this way. There are some groups at google where someone does both tech lead and manager, they call that person the TLM.
Unless you're Norvig or Dijkstra.