Sorry about the cost of your bathroom addition though.
How about: a just and civil economic system is one where the more utility I produce the higher quality of life I can achieve?
This is very different from what you implied (being punished for creating value). Taxes and UBI aren't in opposition to this. It still rewards production and those that create value. It also recognizes that hard work isn't always valuable (digging a tunnel with a spoon is harder than with heavy machinery. But the latter provides more value). Maybe we should frame things this way instead. Progressive taxes do not result in situations where a raise in pay causes a decrease in take-home money. It does instead address the issue that money is sticky and the mere existence of capital passively generates capital (which actually means you generate wealth without doing work). Fine at certain levels but clearly can get out of control (generate wealth for retirement vs generational/perpetual wealth where your children end up wealthier than you passively).
That's to say that functional courts and a state that acts as the only legitimate applicator of force tends to be a lot better for the rich, and those too fall (or themselves turn on the rich, too) when they stray too far from the line.
Bullshit, at least in the USA. I make too much money to get EBT, the same free phone we issue to illegal aliens, etc.
Not the right framing, but not far off. It depends where you set the threshold and how much you extract. Remember that money is a resource where positive feedback loops exist: "you have to have money to make money", "the first million is the hardest", or "passive income." We can think of money as sticky and attractive. Momentum matters. Also remember that a capitalist market relies on competition and money to be fluid and constantly exchanged. Transactions are not zero-sum, but many times result in a positive value. This is even true in a pure fair transaction and without considering external costs like taxes.
tldr: there are sources and sinks in the economy and this is conditioned on the value in the previous time-step. Capitalism works well when value is continually exchanged: meaning sinks are bad.
Once we consider these things, "fair" gets more complicated. One can argue that it isn't fair that wealth begets wealth. That certain goods have an economic value that is not being captured by the evaluations, and are often difficult to put price tags on (e.g. air quality). Tragedy of the commons is quite real. One can also argue that it isn't "fair" that the system does not optimize for societies and instead optimizes individuals. Fair is difficult to define and none of this is as easy as it appears on the surface. Both pro and anti-UBI people make these mistakes. I'm not attacking a particular side but rather suggesting this isn't as straight forward as you have characterized.