Joe Berchtold, the president and CFO of Ticketmaster parent company Live Nation Entertainment, testified before a Senate committee on Tuesday, two months after the Swift ticketing fiasco reignited public scrutiny of the industry.

Groetzinger testified that as long as Live Nation remains both the dominant concert promoter and ticketer of major venues in the US, “the industry will continue to lack competition and struggle.”

“These issues are symptomatic, I think, of a larger problem,” said committee chair Sen. Dick Durbin, arguing that live event ticketing has been “dominated by a single entity” that was created from the merger.

In December, lawmakers from the House Energy and Commerce Committee sent a letter to Live Nation CEO Michael Rapino, demanding a briefing on what went wrong and what steps the company is taking to fix the problems.

“The recent pre-sales ticketing process for Taylor Swift’s upcoming Eras tour – in which millions of fans endured delays, lockouts, and competition with aggressive scammers, scalpers and bots – raises concerns over the potential unfair and deceptive practices that face consumers and eventgoers,” the committee wrote in its letter.

The committee noted it had previously raised concerns about the industry’s business practices and said it wanted to meet with Rapino to discuss how the company processes tickets for concerts and major tours.