I think that lots of people misconceive how state level UI replacement rates are calculated. It's not the case that states are currently just setting replacement rates at 45% and we can just change the variable.

Here's @USDOL's table of how each state calculates UI: https://oui.doleta.gov/unemploy/content/sigpros/2020-2029/January2020.pdf

Alabama: Find the 2 highest income quarterly earnings, average them, divide by 26. Weekly minimum of $45, weekly maximum of $275.

Alaska: Get between 0.9% and 2.2% of your annual wage (based on what?). Add $24 for each dependent. Minimum is between $56 and $128, maximum is between $370 and 442 (again, based on what?).

Arizona: You get 1/25 of your income in your highest recorded quarter. Min $126, max $240.

Arkansas: Take wages in the last 4 quarters, average them, and divide by 26. Min/max - $126, $240.

That's just the A's.

They have different definitions of baseline period. Use different divisors to move from quarter to week.

Here is a list of states that DOL says sometimes change their base period calculation "under certain conditions":

AK, AR, CA, CO, CT, DE, DC, GA, HI, ID, IL, IA, KS, ME, MD, MA, MI, MN, MT, NE, NV, NH, NJ, NM, NY, NC, OH,
OK, OR, PR, RI, SC, SD, UT, VT, VA, VI, WA, WV, and WI.

West Virginia is fun - 55% of 1/52 of median wages in
worker’s wage class.

Here's a table with all 254 wage classes: http://www.wvlegislature.gov/wvcode/ChapterEntire.cfm?chap=21A&art=6&section=10

Colorado:

Higher of:

- 60% of 1/26 of 2 consecutive HQW, capped by 50% of State avg weekly earnings or

- 50% of 1/52 BP earnings capped by 55% of State avg weekly earnings