Bitcoin is founded on the principle that money is a medium of exchange and NOT a commodity in and of itself (which can be bought and sold for profit, at interest).
Any system which advocates the use of interest is simply usary which inevitably leads to enslavement by central banks with their unlimited money. By relying on 'work done' bitcoin rids us of this form of enslavement. Therefore increasing the blockchain size, eventhough it seems limited, stays true to the basic bitcoin principle. The limitation argument is the same they used to get rid of the gold standard and create all those exotic derivatives which are now imploding.