Re: What?
Someone sensible came up with the idea of over 600 MPs because such a large number will spend far more time arguing with each other than doing any governing. The work-around was to select a few - the cabinet - to make all the decisions then coerce, intimidate or con most of the party to vote as required. The cabinet used to be about a dozen with reasonably separate responsibilities so each could set policy in their bailiwick without consulting the others for every detail.
At some point it became so obvious that even a prime minister noticed there were not 12 candidates in the party capable of running a branch of government. The solution to decades of negative selection was simple: increase the size of the cabinet to about 100 and give each of them overlapping job titles.