RR needs to start being smarter and lose the politics of envy. We can't keep "taxing the rich" to solve the problems, nor can we go back to benefit bashing. We've had 2/3 decades of such "easy" but utterly useless policies being banded about. If she is any good, she needs to think of radical changes to the tax/benefits systems to cut the deficit and her "black hole".
I.e. how about finding ways to incentivise people to work, whether they're currently unemployed, disabled, early retired or part time. Instead of reducing their benefits and increasing their taxes to "punish" them for working, what about looking at the tax/benefit system so that people wanting to work, or to work more hours actually see the benefits of doing so, i.e. money in their pocket, rather than money lost to tax/nic and benefit cuts.
It's a crazy state of affairs when people can be worse off for doing an extra shift or taking a promotion, but at several different income levels, that's exactly what happens, due to a combination of tax/nic/student loan deductions from wages, added to loss of benefits due to higher income, loss of child benefit, loss of personal tax allowance, loss of free childcare, etc. Like I say, far to many "cliff edges" where you end up barely any better off or even worse off by working more hours/days, taking a better paid job etc.
The answer to the deficit and black hole is to get more people working and more working people working more, to get the economy moving and create growth. Farting around with taxing the same people more, or reducing their benefits just causes stagnation.