1. What fraction of our resources do we want to burn while eliminating which of the worst parts of capitalistic tendencies?
2. How do we preserve diffuse power distributions in the face of actors who will actively work against that goal?
Not to trivialize it too much, (1) is just a policy decision. Being completely hands-off is probably sub-optimal. Burning 100% of resources fighting fraud and other abuses isn't ideal either. It's a reasonable framing though for comparing strategies. There's no free lunch, so if somebody sells you a governmental structure which eliminates the worst parts of capitalism without _some_ cost, it's likely snake oil.
Point (2) is the harder one. The majority of people wouldn't mind a little extra power and a few extra resources. If that's possible, it's also (usually) possible to create sub-populations which together have much more power than other groups and thus subvert the goals of your anti-capitalist strategy. How do you create a system that's robust against most individual participants (potentially inadvertently) working against it?
So, sure, let's do away with capitalism. What do you replace it with that's both better and won't revert back?