Yes, under austerity, central government has slashed funding to local councils by huge amounts since 2010. It's had an impact on all areas, including social work and social care.
The Tories went to the last election on a manifesto of further massive cuts in all welfare areas. Both cuts to local council funding, and cuts to eg direct disability benefits, which of course throws more weight on council and NHS services. Changes to the DWP which end up throwing people onto the mercy of foodbanks. Bedroom tax and other housing changes which end up costing councils more and pushing people on the streets.
It wasn't any kind of secret: people voted knowing this. It's a choice.