The Left continues to attack classical liberalism (although they now call it "neoliberalism") precisely because it's the liberal ideology that continues to provide the most consistent opposition to the leftist program. If liberalism had failed, the Left wouldn't still be attacking it.
Michael Sandel doesn't like capitalism. But he can't seem to manage an economic argument for why. He's content to claim that capitalism is morally corrupting, converting anticapitalism into a sort of pseudoreligious faith.
Most of the world's regimes enthusiastically destroyed their economies and consigned millions to destitution (and a rising tide of resulting health problems) in pursuit of a trendy and unproven theory. There's still not evidence that the lockdowns worked.
The Danish state believes that the nation can avoid economic collapse if the state pays private sector workers' salaries. This, it is thought, will allow private companies to avoid layoffs. But there's a downside.