The only way we are likely to get 'budget' lenses is if Sigma or Tamron bring them out.
Looking at Canon & Nikon
Canon 135 f/2 £859
Nikon 135 f/2 £1075
(They only do an f/2, not an f/2.
But no 'budget option from either.
Canon 70-200 f/2.8 IS USM II £1699
Nikon 70-200 f/2.8 FL Ed VR £2199
Sony A 70-200 f/2.8 G SSM II £2499
Sony E 70-200 f/2.8 G Master £2499
Economies of scale are clear here - the price increasing as market share decreases