I don't think the power relationship between Scott and Thorpe could possibly be seen as having been on an equal footing.
Sexual predators target people who are very obviously vulnerable. In this particular case, Norman Scott was very young - only 20 years old - when he met Jeremy Thorpe. He was doing a fairly low status, low paid job and relied on his job for somewhere to live. The first episode also referenced his mental health problems when he said he was taking largactyl. If the depiction of NS is correct - and I assume the writer/programme makers have made at least some attempt to research the issue of his character - he also appeared to be extremely naive and emotionally/intellectually vulnerable.
Whether or not JT charmed, bullied, tricked or forced NS to have sex with him, is important but, as with many sexual allegations, difficult to prove. But surely the real issue is whether JT arranged to have him killed. The dog was shot - I presume how this was explained away in Court will be in the final episode tomorrow and the old documentary being shown on BBC 4 might be quite illuminating on these issues.
I think it was totally wrong that homosexuality was a criminal issue and I have every sympathy for those men (and women) who had to suppress their sexuality or live a double life. However, if it is true that JT did behave in the way portrayed, I do not feel sorry for him.