Precisely part of my point, Kevin. It's very frustrating.
In my case, my partner is in the better earning position and already in the UK - however, she is self-employed, and owns a property that she rents out for income. While that puts us over the threshold, you are not allowed to combine income from self-employment and income from "other sources" like a rental property. She can use her rental property combined if she were a salaried employee somewhere, but not if she is self-employed. We could also meet the threshold if some of my money could be taken into consideration, but of course it can't. The ONLY reason we have finally managed to be in a position to go ahead and get married and plan my move to the UK is because of supportive family members who were willing to help dismantle a trust, and move some cash into savings. This trust was in my fiancee's name, through an inheritance, but not in "her sole control" (another requirement) - so instead of being able to simply use the trust as proof of financial solvency combined with the other income, we would have to have it available as cash.
We were advised by our lovely immigration solicitor that the most straightforward application is the best possible chance of being approved. The rules have become so complicated that even someone like her, whose entire occupation is just immigration law, has a hard time keeping up. Therefore, we decided the easiest route was to take the trust money along with any other savings, and put it into a cash savings account, in her name, and use this as our only evidence financially. We've got loads more evidence, but it's too complicated to be worth it. So we've had 62,500 sitting in a bank account since October, not accruing the same kind of interest it could in the trust (which would, of course, give us more money with which to support ourselves and the British economy!) simply waiting to be used for my spousal visa application after our marriage. Somehow, that's supposed to be the easiest and most straightforward way!