The current system is geared towards keeping the rich and poor where they are. I find it interesting that the IRS devotes resources towards targeting a new wealth source available to the poor while not dedicating those same resources towards auditing the wealthy. (I am in no way a crypto evangelist). One could argue that they are going after low hanging fruit, and I would not disagree but I would also argue that they are actively choosing to not target the rich with their limited resources.
I think you analogy is flawed, I would instead compare this case to the police hanging out in poor neighborhoods targeting house parties vs doing the same in rich neighborhoods as they may need to go the extra step of getting a gate code to the rich neighborhoods.
It’s not like going after the bigger evaders would yield bigger fines and maybe lead to bigger budgets.
I think the argument is more along the lines of: "Something is wrong if the police spend zero or minimal effort investigating major burglaries (when they have the resources to do so, as evidenced by their investigations into lesser burglaries). This lack of investigation incentivizes major burglaries by those who have the means to do."