But what do you mean by “warranted”? Businesses are free to set their prices as they see fit (with some caveats), and you generally expect them to do so in a way that maximizes profits.
The prices before these tariffs were arrived at by some confluence of factors such as cost and competition, it wasn’t some universally agreed “fair pricing” scheme that determined them. So what does it mean for a price to be warranted?
Now businesses have to raise prices because of the aforementioned tariffs, and, you speculate, they will add some extra margin because they think the customer is primed to accept higher prices right now than they’d normally be.
First of all, is that the end of the world? If this is only made possible because the wool has been pulled over the customer’s eyes, then at some point there will be a correction in the other direction - unless you’re saying that there is actual and widespread price-fixing (which is illegal and enforced as such). This particular mechanism on its own won’t cause prices to spiral out of control or anything.
Secondly, even if you think it is bad and don’t want it to happen, how would you prevent it? I can’t come up with a single feasible approach that isn’t basically halfway to socialism (which is fine if that’s your preference, but then that’s a larger conversation).