On the one hand you have folks whose intent is to try to do the best thing they can for their constituents. And who enjoy it when the manage to do something useful, or even nice. On the other hand you have folks whose intent is to accumulate power and wield it to pay off the corporate “donors” who effectively own them. And whose greatest joy is “prevent”… and siphoning taxes from the middle class into the bank accounts of the obscenely wealthy (taking a cut for themselves in the process).
This piecemeal hackery is (part of) EXACTLY what they want: Make the process look so artificial and contrived that everyone will lose interest in the whole political process. Which is the only way they get to KEEP the power they now have.