Do you think humans have run out of things to invent and improve? Are standards of living good enough that we can be content to stop here? Why exactly should we expect (let alone hope) that growth will stop?
Direct wealth transfer is a useful tool for mitigating market failures like labor market monopsony and the various negative externalities of excessive inequality. When used correctly, it does in fact improve economic efficiency and societal well-being.
Look at the tens or hundreds of millions of people brought out of abject poverty in China and India and other countries by adopting free market economic principles.
Properly executed redistributive policy absolutely increases growth in the "capitalist sense", whatever that means. That's kind of the whole point.