As I read Jesus in the gospels, the number one text of living faith isn't how often or how avidly you pray, it isn't how often you go to church or anything like that, it's how you manage your money. I would not be fulfilling my responsibility as a spiritual leader in this congregation if I only told you things you liked to hear. You've found that you can give more than you thought you could, and still survive. But those same people seem to be able to commit themselves to a fixed amount for a house payment, a car payment, an insurance payment, rent, etc. If you can't make a pledge because you don't know how much you're going to make, you shouldn't be doing those things either.
Inflation is real, and it is as real for the church as it is for anyone else.
To keep your pledge the same from year to year is actually to give less every year, because the buying power of a fixed amount goes down every year. It won't be much, because once you've paid your fixed bills, bought the car you wanted to buy, taken the vacation you wanted to take, fixed up the house the way you wanted to fix it up, and all that, there won't be anything left. But if you decide first how much you want to give and then shape the rest of your life around that, you'll do just fine. In my 7 th grade Confirmation class, which studies the Old Testament, we look at the difference between Abel and Cain. My 7 th graders could tell you.