It would appear that the relative tax inefficiency of dividends over buy backs (and lack of wealth taxes) has fundamentally messed up the business world.
What's the proposed link here? Wealth taxes don't seem to incentivize the creation of profit. If anything it's the reverse: business owners are incentivized to keep ploughing profits back into the company because it reduces the apparent value of the firm if it's not profitable.
401ks and loans for houses are already things which have specific tax carveouts, so the idea that those would be exceptions even if secured loans in general were taxed doesn't seem like a particularly bold idea.