Ok, try this. It means there will be consequences to being politically lazy now as in protests so that when it all comes to a boil there will be tragic violent protests in the streets ie the delayed gun finally goes off. Jagger seems to be mocking it as if the English people would rather be lazy now and revel in the fact that they sure will do something about it later but only when it comes to that disastrous boil later.
Ok, try this. It means there will be consequences to being politically lazy now as in protests so that when it all comes to a boil there will be tragic violent protests in the streets ie the delayed gun finally goes off. Jagger seems to be mocking it as if the English people would rather be lazy now and revel in the fact that they sure will do something about it later but only when it comes to that disastrous boil later.