LONDON, June 30 : The United States' regulation of artificial intelligence is problematic and inconsistent, Martin Chavez, vice chairman at investment firm Sixth Street, told Reuters on Tuesday. Speaking at the Reuters Momentum AI London event, Chavez criticised the current U.S. approach of regulating each new AI model's release individually, citing a lack of transparency on how decisions are made and who is making them. The outspoken remarks from a technology and financial industry veteran,