You highlight the exact dilemma.
Company A has taxis that are 5 percent less efficient and for the reasons you stated doesn't want to upgrade.
Company B just bought new taxis, and they are undercutting company A by 5 percent while paying their drivers the same.
Company A is no longer competitive.
The debt company B took on to buy those new taxis means they're no longer competitive either if they undercut by 5%.
The scenario doesn't add up.