They don’t expect to go bankrupt by 2033. That’s when the surplus/reserves will run out. The system doesn’t have the fixed amount of money. Current employees are constantly paying into it.
20% is the shortfall between payout vs people paying in. And it will only happen if it’s not addressed. Which I’m sure will get addressed last minute or something like that.
Personal blog on a public Internet is kind of an oxymoron.
The blog post is close enough to an article.