How long ago was that?
I think with VAT, business rates and the cost of inflation on salaries, more will come out of the scheme soon. Round my way only 1 of the 5 local independents are still in - and they're on the way out soon too I bet. We are Surrey based.
Most schools also have no where else to save money on, they're already very efficient.
Most schools aren't afraid of strike action either these days, so many schools have been through this, there are cost benefit analysis, strategies and consultants galore who will all point to strike action being short term pain, for long term gain, and just accept it as part of the journey to exiting the TPS. Very similar to other industries, where all us non teachers are now maxing out at 12-15% employer contributions.
Also, its governor lead, not SLT or Headteacher led - both of which will be loosing their TPS too. So don't ever blame the school leadership.
Sadly, although I agree this is a great benefit, it is blatantly, clearly and absolutely obvious that the scheme is no longer viable and schools will need to come out to survive. Even the constant hanging sword of the TPS, not knowing what way, or what ridiculous percentage it will go up to next year, is enough to cause financial issues for schools, let alone any business.