I think trickle down would actually go against GP's point. Their point seems to be that even as richer SWEs make more money, they price out middle class workers

I think trickle down would actually go against GP's point. Their point seems to be that even as richer SWEs make more money, they price out middle class workers on housing -- then as workers pay more for housing, they have less money to buy things from the companies that pay the SWEs, with a result of putting downward pressure on SWE salaries. Believing in trickle down would actually undermine GP's point. If trickle down was true, SWEs' spending would offset the housing cost increases caused by SWEs, so middle class workers would have more disposable income to buy things from companies that pay the SWEs -- and that would be the opposite of what GP is describing.