My view is that capitalism in any form can only exist through government. In fact, the very source of capitalism, which is private property, is dependent primarily on government.
Why so? Because at the start, there was no private property. Peasants used land owned by no one to produce food, and often they only had little surplus to create the semblance of a market:
http://monthlyreview.org/1998/07/01/the ... capitalismLater, armed men fenced in some of the land (and later, more), creating enclosures. Not surprisingly, the same armed men formed what would later be seen as government, and legitimized ownership of land that was enclosed. Thus was the idea of private property born.
From there, peasants who no longer had access to land that now belonged to someone else, were now given the opportunity to farm the land in return for scrip, which they could use to buy food that they planted in markets where it was sold by the same landowners. Thus came the next aspect of capitalism, which is accumulation of capital.
From there, it was a matter of time for those who now controlled the means of production--capitalists--to do the same for manufacturing and then take control of the credit needed to expand production and pay laborers: the financial industry. That expansion also led to an expansion of markets, and with better technology and resources (such as oil), increase production significantly. Thus, we have the global capitalist economy.
Not surprisingly, the same governments worked with those in power, and military and police forces served them as well to maintain the status quo. As more credit trickled down to the masses, more became part of the middle class, which was also needed as more of what was produced had to be sold, and the same new members of the middle class who often earned by working in the same corporations controlled by capitalists or in businesses financed by or dependent on the same markets, needed to buy and sell more to afford their more expensive lifestyle.
That is why sustainable or localized capitalism or capitalism without or with less government or capitalism without violence or control of most people are fantasies. The very nature of any capitalist system is control of the means of the production by a few, ownership by force that is later legitimized, and profit from sales or from investments which ultimately leads to growth. In fact, the very presence of profit and interest negates any point about a steady state, sustainability, or localization.
Finally, can anything be done about this? Likely not, because most human beings lack basic needs and want what the middle class has. The middle class, in turn, can only receive their wages, returns on investment, and profits by selling more goods and services to the same larger group. The same goes for businesses large or small and governments.
What will stop the system will be continued GFC coupled with peak oil, environmental damage, and global warming.