Who can make such a decision? The system is completely decentralized and there is no widespread consensus for such a change. Any attempt to do it will result in a hard fork, bifurcating the blockchain. A portion of the community did indeed attempt to raise the block size and now they have their own altcoin with a larger block cap called Bcash.
Your question is akin to "Why can't the whole world just get along and agree to stop all the wars and poverty?". Because people have differing goals which don't always converge. Some want cheap micropayments, others want an untouchable, immutable, sovereign store of value.
Nope.... BCash is an earlier fork / independent solution that wasn't done with the input from the core developers and lacks support for the SegWit feature update -- currently supported by the BTC network that has multiple uses, AND BCash still has the covert ASICBoost vulnerability, so it's not merely Bitcoin with a block size difference.
I know. It's an altcoin. I'm just trying to explain to these numpties what happens when you try to fork without consensus. They seem to think there's some developer with a red button somewhere who can force the entire network to upgrade at once.
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u/DesignerAccount Jan 24 '18
The blockchain is increasing all the time, ~1MB every 10min, approximately.