Well, I could certainly put up an argument that tax relief schemes harm us all.
Harnessing a tax relief scheme so your income becomes low enough to claim a means-tested benefit harms us even more. It's not free money - you and I are paying for it.
For reference, I'd get the benefit anyway - but it would be reduced rather than going entirely. Overall it means I get about £200 extra child benefit over the C2W 18 month period I'd have lost. Just because the government decided to introduce income-based child benefit limits, and then move them.
Does it harm us all? Maybe, maybe not. I'd have not bought the bike, so it's VAT revenue contributed which wouldn't have been. I'll have an end contribution which goes to the government as well = more VAT.
We're paying for it yes. Is it moral? I'd put the point that I'm bunging a fair amount of tax into George Osborne's account, which I don't compain about doing. I
could shove it via an offshore account or similar dodgy investments, but a) I wouldn't and b) there's not enough left with two kids and trying to pay off a mortgage ASAP.