Thats a good point though. But under the current wage he is getting (75k), is actually in line with our top young striker MG, who got this pay rise (75k) after scoring 17 goals in his first season here. So I would say Hojlund won't get another pay rise soon if he is only scoring at 10-15 goals range in coming seasons.
However, I would say he may only get a pay rise if he is going to consistently scoring around 20+ goals per season, which means he would become big success here. By then comparison with Kane would be not worth much of a discussion, as we are getting 20+ goals striker who is in his early 20s, instead of getting a 25-30+ goals striker who is in his early 30s.
And even so, surely he wouldn't be getting anywhere near Kane's 575k per week, far from it. My expectation is he may get a pay rise to 150-200k if he is consistently scoring 20+ goals per season. But of course if he is scoring at Haaland's rate (40+ goals), he may still get Kane's wage. But I don't think anyone would complain if he is scoring at that rate.