But how much will trickle down to non large coorporstions after the poorer have paid rent and food?wealthy often spend large amounts of cash.
I think you need to think a
little more carefully.
If you're poor - really poor - you pay your rent either to the local council (who will tend to spend it locally on local builders and local services) or to a dodgy bastard landlord (who will spend not enough of it on building repairs and the rest of it on a mortgage, from where it will get recycled into loans to small businesses). And you buy your food from your local shop or the local market if you can get into town, because you don't have a car to get to the out-of-town supermarket, where the food might be cheaper but in any case they're extremely practised at getting you to spend more than you wanted to.
The reason the wealthy are wealthy is precisely
because they don't spend much.
[Like I said, there's plenty of evidence out there, and it's been discussed endlessly on a different sub-board.]