Other assets are (supposedly) productive - investing in companies lets them do research, pay employees, etc, investing in property improvement (as opposed to land) gives more people nicer homes.
> That begs the question, is even more regulation really the best solution?
Even more than what? These regulations would improve things. Which particular regulation do you feel is harmful?
Allegedly, "if you want to preserve wealth - it's easy just buy wealth (stocks, real estate, land)."
In other words, this is intentional to push people towards preserving wealth in the form of assets. But this creates issues where assets become over-valued - and some assets (real estate and land) are necessary to survive.
Your proposal is to tax the ownership of assets (i.e. the preservation of wealth) in order to ... push people back towards capital (i.e. for the preservation of wealth)?
This doesn't really compute.
Inflation is a sort of (not very effective) flat wealth tax. But inflation is necessary because in a deflationary system the best investment is holding cash, which makes everything freeze up.
Wealth should be (minimally, progressively) taxed, mainly to prevent serious distortions when someone has $1B in the bank and most have $10K.
Taxes, regulations, and subsidies on assets needed to survive (shelter, utilities, food, medicine) are necessary to keep these items available to everyone, because the market tends to break down in these situations.