I think we need to put the (often justified) anti-MP rhetoric aside and remember that this is a massively important building from a cultural, historical and architectural perspective. It must be one of the most famous buildings in the world.
We, as a nation*, have let it get into a state where it is literally nearly falling down. That’s pretty crap. It costs so much because we* have let it get into such a state, but it would be appalling not to do what needs to be done.
*I say ‘we’, because every politician has always known that the general public will always get sidelined/distracted by the ‘bloody politicians feathering their own nest’ debate whenever any mention of doing improvement works at the Palace of Westminster. So, it’s always been bodged in, done on the margin or just ignored.