If it earns for you while you sleep then it is also taxed while you sleep. Income is income: the tax man doesn’t care where it comes from.
Honestly, my major problem with wealth inequality is not that rich people get to have money; it's that wealth concentration leads to power concentration. That's not healthy for democracy. This is probably extremely controversial, but I say go ahead and collect a wealth tax and then burn everything you collect. It's not about the budget, it's about limiting the power of billionaires and the corporations they control. There are probably better ways to accomplish that goal, but a wealth tax is at least a start in the right direction.
I'm not totally convinced by this. in fact, I'd argue the opposite: wealth is the result of power, not the cause. consider jeff bezos; I'm sure we would all consider him a powerful man. is he powerful because the shares he holds are worth $200 billion (on paper), or is he powerful because he controls one of the largest companies in the world?
here's a thought experiment. suppose there was an asymptotic tax that limited net worth to a maximum of $1 billion, so jeff bezos would only have 0.5% of his current assets. how much would his power be diminished? I tend to think his status as the founder and CEO of amazon would put him in a pretty similar position.
[..]In economics, capital consists of human-created assets that can enhance one's power to perform economically useful work. For example, a stone arrowhead is capital for a hunter-gatherer who can use it as a hunting instrument; similarly, roads are capital for inhabitants of a city. Capital is distinct from land and other non-renewable resources in that it can be increased by human labor, and does not include certain durable goods like homes and personal automobiles that are not used in the production of saleable goods and services. Adam Smith defined capital as "that part of man's stock which he expects to afford him revenue". In economic models, capital is an input in the production function. [..]
i think you misunderstand what capital really means..
Mostly it's about creating imbalances particularly great ones so that power can be projected through coercion. The world runs on on the wealthy getting poor people to do the work they don't want to. With the rise of the finacialised economy we are far away from your definition.
That's a big assumption. Not all capital earns for you while you sleep.
> Those who benefit the most from the system should pay for it.
That's also a big assumption. Just because one has capital does not mean they're benefiting from the regime they're currently under.