Being a LL is a business and should be treated as such. If there is no contingency then a business would go under. It is widely known that HB takes at least 6-8 weeks to process, if you cannot cover that period you can't afford the BTL property. I have no sympathy for a LL who has overstretched themselves in order to have a property paid for by the state.
As for the benefit system, it is archaic and administered (mostly) by jobsworths who do not connect their tardiness and inability to complete paperwork in a timely fashion, to a familys ability to eat.
I completely agree with you wannabe. Unfortunately if you took away all the BTL landlords who operate on a very, very tight margin for whatever reason (particularly in circumstances like the last poster said, she is not a LL through choice) there simply would not be enough property to go around.
I am a landlord but I would still welcome a return to the old system of many more council/HA properties that are offered at sensible rents for people on low incomes (especially low paid key workers) who fulfill certain criteria of need, and that cannot ever be sold off to the long term tenant. People would perhaps be more motivated to take low paid jobs rather than stay on benefits if it was linked to their ability to secure decent low-cost social housing as well.
Perhaps the system should be that as your salary increases your council/HA rent goes up, and you are asked to either leave and rent privately or pay the increase accordingly. That way the people with the greatest need would have access to affordable social housing as there would be a more regular turnover when previous tenants better their circumstances and move on. If they choose not to at least they will be contributing a fairer level of rent in relation to their income. There is and always has been a huge problem with subletting of HA and council properties as well, which should be dealt with and punished much more harshly. It's morally reprehensible IMHO.
I would also welcome a system where HB is always paid directly to the LL. It would stop so many vulnerable people ending up being kicked out of their housing because they robbed Peter to pay Paul and got in a pickle with their finances. The other huge problem is that if you fall seriously behind with your rent and your LL wants you out, as an HB tenant you are advised to stay put until you are physically evicted, otherwise the council deem that you have made yourself intentionally homeless and you are not a priority for re-housing. Of course this is time consuming and hugely expensive and stressful for a small time LL, and most are just not prepared to take the risk so they stay away from HB tenants even if they are not bound by their mortgage company.
I have a person in one of my properties who is solely funded by social services paid directly to me (tenant is a care-leaver in a complicated, non-straightfoward situation.) It took me 8 months to get a single penny in payment for that tenant, and the deal was all utilities included, so you can imagine how much that cost me upfront!