Anticapitalists often complain that people with more money exercise power over people with less money. Yet these same people seem oddly untroubled by the fact that central bankers can manipulate the money supply at any time to enrich themselves at everyone else's expense.
If the small sample size of monetary history is any guide, the combination of asset market crashes and high goods inflation empowers sound money forces in the political arena. At the moment, neither of those factors are in play.
In order to expand production and increase productivity — and thus increase the standard of living — it is necessary to use capital. And so it makes sense to pay interest on capital lent, so as to encourage the maintenance and production of capital for the future.
The idea that people are driven by fear of losses more than they are by the potential for gain has attained a sort of dogmatic adherence among behavioral economists. But there's a problem: the theory isn't true.