I agree that the taxation systems in Europe can be simplified and changed to benefit startups a little more.
I would suspect that things are better in the Nordic countries, and maybe the Netherlands too.
Definitely. I have my gripes about social security in The Netherlands and I think basic income would be better, but social security is pretty good: 75% of the last income for the first two months, 70% for the remainder of the year. After that, a single gets Euro 960.83 per month, a married couple Euro 1,372.62 per month, plus an extra amount quarterly per child (which IIRC everyone, including working people, gets).
With regards to retirements, everyone gets so-called 'AOW' (850,97 per month or 2 * 586,56). Normally when you work, you also collect money in a private pension, which gets added to the AOW. AOW is directly paid by taxes, the private pension is a fund.
Normally, when you work all your life, AOW + pension + home ownership gives you a royal retirement.