I think a lot of people forget that - sadly - money makes money.
ISAs "favour the wealthy" in as much as the more you put in, the more you get out. Suggesting that "favours the wealthy" is like saying the housing market "favours the wealthy" because bigger houses cost more.
The real problem is the exponential nature that seems to surround money. £100 only grows twice as fast as £10, and £1000 grows 3 times as fast (can you see what's going on here ?). I remain to be convinced that is an emergent property of money rather than a contrivance on the part of the societies that have adopted it.
Posters without an agenda are free to comment. As indeed are posters with an agenda. And posters who think an agenda is something to do with trans issues. However under the Hague Convention of 1898, ratified at the Treaty of London 1903, I retain my right to ignore bad faith actors.