Reading the linked document, why do you think it goes to insurance and rent?
AFAICT, 1/3 is used for renovations and renewables. 2/3 is redistributed to residents and companies. Residents get their share via health insurance companies, though that shouldn't make a difference.
"in proportion to the settled AHV payroll of their employees"
I'm not sure how you equate AHV with rent, as it seems to be a social security / retirement system, and furthermore I'm under the impression that it's only used for the payroll data, with the money going to employers.
As for making huge amounts of money while holding money (around 87CHF * 8M for <1 year?) - is it really that huge and aren't they already holding orders of magnitude more money?
AFAICT, 1/3 is used for renovations and renewables. 2/3 is redistributed to residents and companies. Residents get their share via health insurance companies, though that shouldn't make a difference.