Where it does discourage work, the effects are extremely minor. Your contention that their wealth was before the welfare state is completely incorrect and ahistorical. Even the crudest measures show that to be wrong. Examples:
http://www.tradingeconomics.com/denmark/gdp
http://www.tradingeconomics.com/sweden/gdp
For France, the numbers since 1960 have been fantastic overall. Look through the OECD measures:
https://data.oecd.org/france.htm
I'm sorry, but your statements don't hold up to any of the measured data, and this excludes things like perceptions of corruption or gross happiness. No country is perfect, but the ones I listed are doing better than the US on almost every internationally recognized measure.
Your second one doesn't undermine the case; it mainly discusses that tweaks are needed, not that the social democratic system doesn't work as you've implied. No one is arguing that the numbers never need to change; the entire discussion about the US is that the numbers need to change (in the other direction.)
As far as whether those people would accept the offers, it's possible at the margin, which are the minor effects I've mentioned. The numbers matter, though. France is a particularly bad example to use considering its job performance:
http://krugman.blogs.nytimes.com/2014/05/21/cheese-eating-jo...
It'd be different if you cited credible right-wing (economic) sources, but there are few left since the intellectual foundations of much of what passes for economics on that side of the divide (a chaotic Reagan-Thatcherism, a right-of-center Neoliberalism (older FT/Economist-style), or a wild-eyed goldbuggery) have fallen apart in the modern world. It's not symmetric at this juncture.
http://www.bloombergview.com/articles/2015-06-03/economics-t...
We can stop the discussion, sure. Let's do that.
If someone were to argue about the less biased nature of Cowen, Hanson, or Murray, or other RW intellectual, we might have a discussion. I don't agree with those people half or more of the time, but I definitely trust them to change their minds and look at the facts, rather than having an a priori position immune to facts. I don't expect the same from Cato, and certainly not from AEI or Heritage (whom I consider far more biased than Cato.)
Did you read your own link? Your own link says: "There is little doubt that welfare can discourage employment, particularly when recipients lose benefits quickly as their earnings from work rise. Still, the effects are muted."
> largely
> the effects are muted