[bluGill]

If you have a solid case any good lawyer will take the case for a share of what you win - they won't win all such cases, but they have enough confidence in winning most that they can afford to accept a cases will be done without getting paid. However if there is loser pays lawyers cannot do this unless they either take a much larger share for the winnings (thus making it not worth anyone's time) so they can cover the lawyer fees when they lose a case they thought was obvious, or they need to warn potential clients there is risk they have to pay a lot of money on a loss.

Either way loser pays makes it more risky for a poor person to sue.