This did happen, but primarily due to propaganda of the right wing which tried to portray this as an old vs young conflict, when actually it's a poor vs rich conflict.
Tax might rise a little bit for working people due to this, but as the rent that was expanded here (AHV) is a great distribution tool, around 90% of the population will later get more money back in rent than they're paying into it now.
Also, the method to finance this is not yet set. Some centrist politicians are open to financing this by raising a tax on finance market transactions, which would probably be the most social. (And of course lefties like me would love to finance this with an inheritance tax, but that has almost no chance)
Yeah, it's very rare for more funds being obtained from taxing richer part of population. A quick google search gave this opinion of Swiss finance minister:
Finance Minister Karin Keller-Sutter has said that since Switzerland is already running a budget deficit, the approval will likely require an increase of value-added tax.
Welcome to the gerontocracy. The demographic failure of democracy, as an ageing population has the power to vote for consuming the country instead of investing in its long term stability.
Switzerland is also the last european country to have granted women the right to vote on the federal level in 1971 with the last state to grant women's voting rights in 1990. At the same time Switzerland already had the best or second best HDI in the world.
The metric is entirely unrelated to democratic values, political culture or political education.