Though I think they are not spending it sustainably. There is one train line and one lightrail line between my city and the next big city. They want to do things to the train line, blocking it for half a friggin year, and they make that announcement as if they do not give a damn about anyone, who relies on that line. Everyone will have to squeeze into the lightrail trains, which take longer. Often whole carriages are mephitic and unusable, when certain people have made them their temporary homes.
If things were done with an eye to the future, we would see things like extra lines, so that when things need to be renewed/maintained train service is not completely and utterly fucked for half a year for thousands of people, who want or need to take the train for daily commute. It is in my eyes utterly ridiculous, that we rely on a single track and are fucked, when literally anything at all needs to be done. Instant 100% train service disruption. This is Deutsche Bahn reliability.
Of course that would cost more ... It's cost accumulated by decades of neglect, and now they don't want to spend that money on the citizen, but rather pay biiiig juicy bonuses for management levels at Deutsche Bahn. Predatory capitalism at its best.
And that's not all. Their software and app sucks ass too.