It's possible that some of the answers given to the question are actual descriptions of a person's moral motivations. At one time I was teaching lots of Middle Eastern male students from countries with legal systems closely allied to divine law. They consistently claimed that if God did not threaten them with punishment they would not be moral. I took that to be an honest statement about their personal motivations. In other words, the question may not be a strictly philosophical question but a question about the kinds of motivations which different societies produce.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13