The lack of knowledge here is amazing.
To say or think that wage earners were poor shows ignorance. Here are some occupations that DID NOT TITHE:
Arts and Crafts: Ex. 31:3-5; 35:31-35; 2 Ki. 16:10
Baker: Gen. 40:1-2; Jer. 37:21; Hos. 7:4
Builder: 2 Ki. 12:11; 22:6; Ezra 3:10; Matt 21:42; Heb. 3:3; 1 Pet. 2:7
Carpenter: 2 Sam. 5:11; 2 Ki. 12:11; 2 Chr. 24:12; Ezra 3:7; Isa. 44:13; Matt. 13:55; Mk. 6:3
Cook: 1 Sam. 8:13; 9:23-24
Doorkeeper: 2 Ki. 22:4; 25:18; 1 Chr. 15:23-24; Jer. 35:4
Fisherman: Isa. 19:8; Jer. 16:16; Ezek. 47:10; Matt. 4:18; 13:48; Lk. 5:2
Foremen: Ruth 2:5-6; 1 Ki. 5:16; 2 Chr. 2:2, 18; Matt. 20:8
Fortune Teller: Deut. 13:1-3; Acts 16:16
Goldsmith: Neh. 3:8, 31-32; Isa. 40:19; 41:7; 46:6; Jer. 10:9, 14; 51:17
Hunter: Gen. 10:9; 25:27; Jer. 16:16
Innkeeper: Lk. 10:35
Mason - Stonemasons: 2 Sam 5:11; 2 Ki. 12:12; 1 Chr. 22:15; 2 Chr. 24:12
Merchant - Trader: Gen. 23:16; 37:28; 1 Ki. 10:15; Neh. 13:20; Ezek. 27:3, 22-23; Matt. 13:45
Musician: 1 Ki. 10:12; 1 Chr. 6:33; 9:33; 2 Chr. 5:12
Perfume Maker: Ex. 30:25, 33, 35; 37:29; 1 Sam. 8:13; Neh. 3:8
love-peddler: Gen. 38:15-24; Lev. 21:14; Josh. 6:17, 25; Judg. 11:1; 16:1; Jer. 3:1; Joel 3:3; Matt. 21:31-32; Lk. 15:30; 1 Cor. 6:15-16; Jas. 2:25
Scribe - Teacher of the law: 1 Chr. 2:55; 1 Chr. 24:6; 27:32; Neh. 8:1; 13:13; Jer. 36:26; Matt. 2:4; Mk. 2:6; Acts 4:5 (They did not tithe on any income from being a teacher or lawyer.)
The Israelite farmer who inherited the promised land DID NOT TITHE from their income.
When the children of Israel reached the promised land, with their animals, etc., every "family" had a farm. But every "family member" was not a farmer. They had all kinds of occupations. But the "family" had a farm, and the tithe came from the crops and animals in herds and flocks, NOT from the wages or other types of income from the "family members." The command to tithe wasn't on each individual, but rather on the "children of Israel" as a nation, or as a whole. Church leaders put the tithe down to the individual level which is wrong. Putting the tithe down to the individual level creates all kinds of problems; i.e. some tithed, some did not. It creates the problem of understanding that ALL attended the yearly feast, but not all tithed. When you see the big picture that the tithe was on the nation as a whole, and not the individual, everything starts to fall into place.
Today, ALL born-again believers are priests. ALL of us are called to be disciples of the Lord. No one of us is greater than another. Our bodies are the Temple where the Spirit dwells. According to the scriptures, priests do not tithe.
The New Testament teaches generous, sacrificial giving, from the heart, according to our means. For some, $1 might be a sacrifice, while for others, even giving 50% of their income might not induce a sacrifice. In the Old Testament, ONLY the farmers tithed, and it was a tenth. The New Testament teaches the principle of equal sacrifice instead of a tenth. Equal sacrifice is much harder to achieve, if not impossible, than giving a tenth.
Today, those who tithe have a mindset that starts with a tenth. That is not only wrong, it many cases it shows selfishness. As a non-tither, my mindset starts with "give what the Spirit leads me to give" and "give where the Spirit leads me to give." Being Spirit led, my giving never starts as low as a tenth.