They should be playing But at a lower Tier. ICC should do the obvious and institute a 2nd Tier comprising the
bottom six or 5 Test teams. WI needs to rebuild their cricket and would be well suited to this level at this time.
The Big three India,OZ and England along with New Zealand, South Africa and Pakistan and or Sri Lanka should be in Tier One.
Of course there should be promotion and relegation with the bottom team in Tier One demoted to Tier Two and the winning country in Tier Two elevated to the top Tier after each cycle.
Maybe to get this started,an exception could be made to ensure the Big Three remain in Top Tier for a few cycles at the outset ,even if one should finish at the bottom .
I think this is one of if not the main sticking point that prevents the reality of the 2Tier system as none of the Big Three will entertain such a prospect of relegation.
So a compromise could be entertained as the Big Three is where Test Cricket is surviving
very well.