The last time we amended the constitution was 32 years ago, and that was more than 202 years after the amendment was originally proposed and approved by Congress. This amendment effectively does not allow Congress to get a pay raise until their next elected term. Unsurprisingly, when this amendment was brought to the public’s attention in the 1980’s, Congress majorly pushed back about it. But the amendment was gaining popularity publicly and it was ratified by 2/3rds of the states, so congress had no choice but to accept the amendment as valid. This may have been otherwise impossible to pass if congress hadn’t already approved the amendment over 200 years ago in 1789.
Just because Congress should be a certain way, does not in fact make it reality. Congress frequently makes unpopular decisions. And when you have some representatives that have an equal say in the vote that represents a fraction of the number a people of another representative, what the majority of people want doesn’t really matter politically in most cases.
Now you’re right about one thing, if this platform is popular enough, there still might be a possible path forward to achieve a constitutional amendment. But it’s far from a certainty and more likely a long shot at this point. It could take decades or more until the amendment is both approved and ratified, if it’s even politically possible at the moment. It’s not as simple as, if the people want it, they can vote for it; because that is just not the current reality in American politics.