Apologies in advance if this suggestion is based on a misunderstanding of how participatory planning is intended to function.
I’m wondering if the following has been considered: besides the existing consumption credits that people would receive in a participatory economy, they could also receive investment credits, symbolizing each person’s share of society’s capital. However, these investment credits would not be redeemable for products/services. Instead, they would act as “votes” for proposed public goods.
Surplus would be accrued by society, but the direction of that surplus towards social investments would be determined by individuals, similar to crowdfunding campaigns.
My reasoning behind this thought/suggestion is to minimize bickering that might arise in councils that are struggling to decide what to consume as a community or as a federation. The council meeting would serve as a public forum where members could ask questions and generate ideas, but then proposals would be posted on an online portal and be “funded” via these investment credits.