Time for Old Firm to Leave the Premiership?

I think both Celtic and Rangers should invest heavily in leaving the Scottish Premiership, calling on their fans for funding as necessary.
They need a bigger stage and the rest of the Scottish clubs need to be in a league structure that allows for a decent level of competition.
Without Celtic and Rangers, none of the remaining clubs will be strong enough to dominate for any length of time. In a ten year period, I can see the potential for five or more clubs to challenge to be champions – and they will be better supported as a result. The boring, dreary, repetitive, non-competitive Premiership cannot be allowed to survive in its current form.
Time for Change.