I am not the original commenter, but I interpret it to mean that large corporations can almost always arrange it so that they don't pay tax or don't pay their fair share of tax. 88 companies paid $0 tax on $105B in profit in 2025[0]

[0] https://itep.org/88-profitable-corporations-paid-zero-income...

I agree that corporate taxes are not working at this time for one specific country. But the claim of "corporate taxes don't work" is much more broad and not something I've seen specific evidence for. My understanding was that historically corporate taxes have been extremely effective, even if those taxes aren't paid the profits of a company are instead redirected as other investments.