That's complete bullshit, hiring bonuses don't have to be repaid if they terminate you for any reason. They were trying to make you feel like the manager went to bat for you, which isn't the case.
Check your employment paperwork. Sometimes they do, sometimes they don't. To make you pay it back after just hiring is a jerk move, but not all executives are kind.
Why would anyone sign a contract that makes them liable for the relocation expenses (that could be easily ~50K for intercontinental moves) based on a risk that is outside their control?
- Because they read it closely but didn't interpret it correctly.
- Because they brought it up and their counterpart said "don't worry, that's boilerplate and we've never actually used that clause".
- Because the alternative was signing a contract that had no relocation/hiring bonus.
- Because they needed a job, and that's what was there.
- Because they really really needed a job to keep health insurance or their visa, and they had no leverage.
- Because they had leverage, but were too inexperienced in negotiations to realize it.
- Because they had leverage, but were not comfortable using it, and were taken advantage of.
There's lots of reasons, of varying quality, that someone may do something that seems ridiculous to you. Why are you implying that the (hypothetical) losing party here is the one who's done something wrong?
All I am saying is that in a relatively safe first world countries in 2019 there are not that many ways to screw up your life big time. But signing a contract that lets someone take take more than your net worth might be based on a risk that they control and you don't, is certainly one of them.
I have actually been in a somewhat similar situation myself and I had spent hours googling all the legalese and running the "worst case" simulations in my head before signing it. And my understanding of possible paths and their consequences was very helpful later when the corporate politics unfolded the wrong way and it helped me exit the situation with a net plus.
My employer has that language in the employment offer. If for any reason during the first 12 months then the pro-rated remainder needs to be returned.usually through withholding future earnings.