Complex sentence: Proponents argued that the measure would limit frivolous lawsuits against companies that result mainly in a windfall for lawyers rather than consumers and that businesses ultimately must pass along their costs in the form of higher prices to consumers.
Split into simpler sentences: Proponents argued that the measure would limit "frivolous lawsuits" against companies, which they claimed result mainly in a windfall for lawyers rather than consumers. Proponents also argued that businesses ultimately must pass along their costs in the form of higher prices to consumers.