http://en.wikipedia.org/wiki/Association_fallacy#Guilt_by_as...
In the capitalist west in the 20th century, it seems to me we've experienced what Marx envisioned, the struggle (sometimes violent) between the upper and lower classes, again and again. It is possible to be right in your assessment and wrong in your prescription.
Strangely enough, I think we're more socialist than we think we are. A huge part of the massive US Govt is pure income redistribution, and even so we're still farther to the right than any European country that comes to mind.
Perhaps Marx was right in his assessment, but maybe there is no prescription. That is never brought up. Perhaps you're condemned to have a standard of living better than most royals enjoyed a century ago (CAT scans, Internet, Jet Travel - capital, capital, capital) and the price is ennui and jealousy of someone with 2000x more paper wealth. Maybe there is no alternative, or all the alternatives are just a lot worse.
In the meantime, I will continue to think that any tax on accumulated capital is evil and label it as Marx 2.0.
1.) Invest in a natural monopoly. That's fine, but most of these are highly regulated (e.g., utilities) and limit your returns.
2.) Invest in real estate. This is rent seeking at its finest. Henry George [1] addressed this issue, but his ideas have not been widely implemented (unlike Marx).
3.) Invest in government debt. I'm always surprised that people like Krugman and Piketty never bring this up, but the fastest way to reverse inequality would be to default on the national debt. The debt is just a transfer payment from tax payers to wealthy debt holders. It is almost like Feudalism.
4.) Buy and hold a nonperishable commodity.
Even your example, the housing market crash, is not an example of hording. In fact, it is the opposite. It is the squandering of capital. Piketty might even argue it was a good thing (like WWII) since it reduced inequality. Or at least it did until the government intervened.
1) High income and high wealth are not the same thing. People keep mixing the two together (switching between "tax high incomes" and "tax the wealthy" like they're the same thing).
2) Many rich people don't have huge piles of money lying around, but instead own valuable companies or other assets. For example, Mark Zuckerberg owns a large part of Facebook, but that's not directly convertible into its equivalent in dollars. In fact, after the IPO, he had to pay an enormous amount of taxes on that, which was money he didn't have at the time [1].
1 - http://www.forbes.com/sites/robertwood/2013/12/20/mark-zucke...
He got that tax bill by exercising his options--he bought shares at $.06 that were worth significantly more, thus giving him a great deal of taxable income. It was in the form of shares, but it was still income. To say he didn't have the money at the time is a bit dishonest--those shares were (and are) highly liquid.
Are they? If he tries to sell all of them, will he get exactly what they're valued at? Selling a quantity like that will probably pull the price down significantly.
This is all guesswork though. Anyone here more knowledgeable that can jump in?
On the day of Facebook's initial public offering, Zuckerberg exercised a stock option and purchased 60 million Facebook shares at a "strike price" of 6 cents each. Even if those shares are never sold, the IRS treats them as ordinary income at the time the options are exercised. The rationale is that such options are a form of compensation, just like regular wages.
1 - http://money.cnn.com/2013/03/28/technology/zuckerberg-tax-bi...
The Mouse and the Market "If you are for technological progress, and its wide availability, then you should be an enthusiastic supporter of capital accumulation and its rational investment." http://mises.org/daily/1786/
Taxing income is horrendous enough, but necessary. Taxing accumulated capital is just plain destructive.