Re: This is why...
The USA does have that, and has had it since the mid 19th century (Might have actually been earlier than that). In any civil case, the losing party pays all costs of the trial (both party's legal fees, plus some money to the court itself to pay for the used resources).
This is why companies are so keen on suing people; their legal teams are large enough and staffed with the best-of-the-best lawyers so that they are almost guaranteed to win and thus not have to pay the $1000+ per hour per lawyer that their law army charges.