It gets worse since a lot of old people vote for heavy conservative parties
This is shifting in (at least) three countries - Norwegian, British, and American millennials aren’t turning to vote for the right wing parties, instead are keeping their trend of voting left. Other countries like Italy have the opposite problem, where even younger voters are starting to vote for the right wing parties. It’s kind of tangential but I think it’s good to point out that we’re seeing exceptions to this rule.
Subsidies are an incredible tool when used well, like when they funded a bunch of utility cooperatives that electrified rural US. Maybe you’re asking why we should because propping up the car industry when public transit and bike infrastructure should be subsidized instead, rather than challenging subsidies, though.