It's trivially easy to refute the conclusion in fact. Fortunately history has already provided the refutation, dozens of times, and history will continue to prove that Capitalism is the only system that works long-term. All other systems rot and collapse, requiring constant reform back towards Capitalism (see eg: Sweden since the 1980s, UK since 1970s). There isn't a single example in world history of Socialism, Fascism, or Communism working. Every example of heavy welfare state systems has resulted in eventual stagnation and decline.
There is no ultimate conclusion to Capitalism, the system continues to create more prosperity, and capital continues to seek higher forms of productivity and profit, which perpetually raises the standard of living for any nation that deploys Capitalism with its well understood requirements (which include a strong judicial system, property rights, et al). New innovations and breakthroughs perpetually lead to new industry and expansion, creating perpetually greater numbers of jobs (which is why America doesn't only have 500,000 jobs available today; and America isn't even a properly functioning Capitalist nation, it's a poorly functioning highly regulated mixed economy).