Disagree. If someone's choice either is to work for G, or start the company, it is the founders risk to take and give up that job for the outsized risk and return of starting up. It is not YC's need to compensate a founder for their alternative.

If you think about these things in terms of "should" and "who's responsibility" you will never understand how it works.

What are the founder's other alternatives? What are there other early stage & incubation options? YC simply does have to compete with that.

I mean, look. Take your idea to the extreme - why do they pay a stipend at all? Why not force the founders to sleep in tubes above the office/outside on the street and supply just enough soylent, huel & low-dosage amphetamines to keep their brain working?