capitalism is capital-ism which is predicated on literally: the more capital you have, the more revenue you get in return (which lets you buy more capital, which lets you sell more things and receive more revenue).
Except, these days, nobody needs to continue buying capital or purchasing labor with their revenue. You can sit back on your unlimited money makers, receive hundreds of billions of dollars in profit, then just hoard it. In a knowledge/skills economy, you can't grow by throwing money at people (since only a chosen few hundred or few thousand are driving things forward anyway). In fact, once you're at virtual peak productivity, investing more would only make things worse due to increased internal coordination costs (meetings! knowledge sharing!) and internal politicking (no—I want to run the new project and I'll turn everybody else against you until it happens!).
If you don't have a use for $100 billion dollars today, why would you turn around and invest it to get $500 billion dollars you also have no use for?
Except, these days, nobody needs to continue buying capital or purchasing labor with their revenue. You can sit back on your unlimited money makers, receive hundreds of billions of dollars in profit, then just hoard it. In a knowledge/skills economy, you can't grow by throwing money at people (since only a chosen few hundred or few thousand are driving things forward anyway). In fact, once you're at virtual peak productivity, investing more would only make things worse due to increased internal coordination costs (meetings! knowledge sharing!) and internal politicking (no—I want to run the new project and I'll turn everybody else against you until it happens!).
If you don't have a use for $100 billion dollars today, why would you turn around and invest it to get $500 billion dollars you also have no use for?