OTheHugeManatee - the tax neutral argument is false, or at best unproven.
There is no evidence for the claim that 'the vast majority of cleaning work is currently cash in hand' that you make.
But even were it to be true, most cleaners earn so little that the tax they pay, if any, is negligible, even if they declare all their earnings as required to do. However, those paying for the cleaners who would receive the tax rebate would, in the vast majority of cases, be higher rate tax payers. So we would be gaining virtually no tax from the cleaners in return for lots of 40% tax lost from their employers - not neutral at all.
Moreover, the cleaners - assuming again, which i strongly dispute, that most cleaners are currently failing to declare their earnings - would not gain in pension terms, as the changes to pensions mean that they will not in future be dependent on having paid in; a flat rate is planned. And any cleaner who tried to claim sick pay would pretty soon find themselves unemployed, as cleaners do not exactly have skills that are unusual or hard to replace. So no advantage to the cleaner at all.
Far better to subsidize jobs that have the potential for growth, both in the role for the benefit of the employee, and in the company/industry for the benefit of the economy/country as a whole.
No-one ever got promoted into anything meaningful or had a 'career' as a cleaner, any more than any country ever got rich by virtue of being professionally cleaned.
If the economy is really in as dire a state as the Tories claim, such that cuts to essential public services etc are unavoidable, then subsidizing the rich in this way is clearly a luxury we cannot afford.