How high? Why is 100k a magic number? 100k isn't even a big deal in SF or NYC. While a high skilled scientist working in say, Corning, NY at Corning Corp or Niskayuna, NY at GE's research labs, 100k enables a king's life. How would you adjust for experience? Perhaps a company sees immense potential and cultural fit in an employee and wants to groom them for future roles? The wages of a 30-year industry veteran would kick the promising young star out of the H1B pool, etc. etc.
Setting a wage threshold without considering other factors is unfairly simplistic.
Besides, companies pay wages based on industry and market averages. You can't suddenly expect them to peg wages to outbid competitors on H1B. Why would Procter and Gamble or Dow or Caterpillar pay university, Facebook, McKinsey, or hedge fund wages? Why should they?