I think you're getting downvoted because what you're saying doesn't match up with the wiki article you linked.
The original estimate was for $1.6 billion, in I'm guessing the 90s, and the estimate had been updated to $5 billion by the time it was formally confirmed for construction.
> The telescope was originally estimated to cost US$1.6 billion,[102] but the cost estimate grew throughout the early development and had reached about US$5 billion by the time the mission was formally confirmed for construction start in 2008.
So yes, it has been over budget, but by 2x-3x, not 20x, and that isn't adjusted for inflation.
Also, everything is just a money pit until it's launched/finished/etc.
That was likely just a bare bones estimate and closer to the costs of initiating the project than the full cost of designing, building, and launching a satellite.
Based on this link, NASA hadn't even settled on a design/contractor in 1998.
The original estimate was for $1.6 billion, in I'm guessing the 90s, and the estimate had been updated to $5 billion by the time it was formally confirmed for construction.
> The telescope was originally estimated to cost US$1.6 billion,[102] but the cost estimate grew throughout the early development and had reached about US$5 billion by the time the mission was formally confirmed for construction start in 2008.
So yes, it has been over budget, but by 2x-3x, not 20x, and that isn't adjusted for inflation.
Also, everything is just a money pit until it's launched/finished/etc.