I don't understand the reasoning that because one opts for expensive training that incurs debt then a high salary is necessary. What other forms of debt behave

I don't understand the reasoning that because one opts for expensive training that incurs debt then a high salary is necessary. What other forms of debt behave that way, where the more you take on the more compensated you should be? I did a physics PhD, which took roughly 8 years of graduate training. My stipend was ~$12k per year for 80 hour weeks, and from that I still had to pay student fees. It's possible to graduate debt free in that situation (I did not), but does that imply that my working salary should be less? Or, because I did take on debt, I should get paid more?