How can companies expect endless growth when inflation eats into personal savings?

I am confused about the whole oligarchy mechanism. The big corporates donate to politicians/oligarchs so that they can get tax breaks etc, which is fine. Then these people do very little to curb inflation or pacify uncertain economic conditions. As a result, people keep on hoarding their savings and spending less and less, which will result in reduced revenues for corporations. Hence, I assume endless growth is not possible. So what is the end goal of rich people who make the rules? Since they are also heavily invested in stocks, not helping the common man make ends meet seems antithetical to their interests of endless stock growth?