When the United States was formed and the compromise for 2 Senators per state and house representatives by population was agreed to, the largest state population was 11x the smallest state population. Today, California is 70x Wyoming. This has the effect that Senators from smaller states have way more power in today's world than they did in the 1800s. The ratios are unbalanced and need to be adjusted just like we adjust the apportionment of house representatives via the census every 10 years.
That was the original thinking, but the 17th amendment turned the Senate into just another House of Representatives, but one where each member has a longer term and a hugely outsized influence compared to the number of people they represent.
Can you tell me why it makes sense for so few people to dominate the wills of so many?