More often than not, antitrust laws are used by the side who can afford lawyers to inconvenience the competition.
A more straightforward approach would be to lower barriers to entry. Both for startups but also, and probably more importantly, for companies from other industries and other countries who want to branch out.
At one point, Walmart wanted to become a bank in the US. The existing banks lobbied hard against that and prevailed. Say what you want about Walmart, but that would have been a breath of fresh air for retail customers and much needed real competition.
A more straightforward approach would be to lower barriers to entry. Both for startups but also, and probably more importantly, for companies from other industries and other countries who want to branch out.
At one point, Walmart wanted to become a bank in the US. The existing banks lobbied hard against that and prevailed. Say what you want about Walmart, but that would have been a breath of fresh air for retail customers and much needed real competition.