To put it bluntly: if they shape society, is that no contribution?
With some struggling, workers could invest part of their wages but they live paycheck to paycheck, of course often also not entirely by their own choice.
Instead of asking everybody to save, money is pooled in billionaires who don't struggle when they invest.
That creates an unfair power imbalance but workers could change everything with taxes if they suffered too much.
Billionaires shape society in their own interests, for unbounded accumulation of private wealth, generated from the labor of others, despite their not contributing any labor of their own, nor making any other contribution.