The ruling for expiation of solid lawful oaths is to give value and weight to testimony in the mind of the oath taker and to elevate people by making them upright and respectable and to increase trustworthiness and security in society - oaths and expiation are not enjoined for the sake of debasing people and enabling wrong.
The difference between a mu-min and a munaafiq is intentions - whether for the sake of pleasing Allah :swt: - or for the sake of rebelling.
At-Taubah 9:62
يَحْلِفُونَ بِٱللَّهِ لَكُمْ لِيُرْضُوكُمْ وَٱللَّهُ وَرَسُولُهُۥٓ أَحَقُّ أَن يُرْضُوهُ إِن كَانُوا۟ مُؤْمِنِينَ
They swear by Allah to you [Muslims] to satisfy you. But Allah and His Messenger are more worthy for them to satisfy, if they should be believers.
Al-Baqarah 2:9
يُخَٰدِعُونَ ٱللَّهَ وَٱلَّذِينَ ءَامَنُوا۟ وَمَا يَخْدَعُونَ إِلَّآ أَنفُسَهُمْ وَمَا يَشْعُرُونَ
They [think to] deceive Allah and those who believe, but they deceive not except themselves and perceive [it] not.
Al-Ma'idah 5:89
لَا يُؤَاخِذُكُمُ ٱللَّهُ بِٱللَّغْوِ فِىٓ أَيْمَٰنِكُمْ وَلَٰكِن يُؤَاخِذُكُم بِمَا عَقَّدتُّمُ ٱلْأَيْمَٰنَۖ فَكَفَّٰرَتُهُۥٓ إِطْعَامُ عَشَرَةِ مَسَٰكِينَ مِنْ أَوْسَطِ مَا تُطْعِمُونَ أَهْلِيكُمْ أَوْ كِسْوَتُهُمْ أَوْ تَحْرِيرُ رَقَبَةٍۖ فَمَن لَّمْ يَجِدْ فَصِيَامُ ثَلَٰثَةِ أَيَّامٍۚ ذَٰلِكَ كَفَّٰرَةُ أَيْمَٰنِكُمْ إِذَا حَلَفْتُمْۚ وَٱحْفَظُوٓا۟ أَيْمَٰنَكُمْۚ كَذَٰلِكَ يُبَيِّنُ ٱللَّهُ لَكُمْ ءَايَٰتِهِۦ لَعَلَّكُمْ تَشْكُرُونَ
Allah will not impose blame upon you for what is meaningless in your oaths, but He will impose blame upon you for [breaking] what you intended of oaths. So its expiation is the feeding of ten needy people from the average of that which you feed your [own] families or clothing them or the freeing of a slave. But whoever cannot find [or afford it] - then a fast of three days [is required]. That is the expiation for oaths when you have sworn. But guard your oaths. Thus does Allah make clear to you His verses that you may be grateful.
Al-Baqarah 2:224
وَلَا تَجْعَلُوا۟ ٱللَّهَ عُرْضَةً لِّأَيْمَٰنِكُمْ أَن تَبَرُّوا۟ وَتَتَّقُوا۟ وَتُصْلِحُوا۟ بَيْنَ ٱلنَّاسِۗ وَٱللَّهُ سَمِيعٌ عَلِيمٌ
And do not make [your oath by] Allah an excuse against being righteous and fearing Allah and making peace among people. And Allah is Hearing and Knowing.
Al-Baqarah 2:225
لَّا يُؤَاخِذُكُمُ ٱللَّهُ بِٱللَّغْوِ فِىٓ أَيْمَٰنِكُمْ وَلَٰكِن يُؤَاخِذُكُم بِمَا كَسَبَتْ قُلُوبُكُمْۗ وَٱللَّهُ غَفُورٌ حَلِيمٌ
Allah does not impose blame upon you for what is unintentional in your oaths, but He imposes blame upon you for what your hearts have earned. And Allah is Forgiving and Forbearing.
Al-Mujadila 58:16
ٱتَّخَذُوٓا۟ أَيْمَٰنَهُمْ جُنَّةً فَصَدُّوا۟ عَن سَبِيلِ ٱللَّهِ فَلَهُمْ عَذَابٌ مُّهِينٌ
They took their [false] oaths as a cover, so they averted [people] from the way of Allah, and for them is a humiliating punishment.
At-Taubah 9:12
وَإِن نَّكَثُوٓا۟ أَيْمَٰنَهُم مِّنۢ بَعْدِ عَهْدِهِمْ وَطَعَنُوا۟ فِى دِينِكُمْ فَقَٰتِلُوٓا۟ أَئِمَّةَ ٱلْكُفْرِۙ إِنَّهُمْ لَآ أَيْمَٰنَ لَهُمْ لَعَلَّهُمْ يَنتَهُونَ
And if they break their oaths after their treaty and defame your religion, then fight the leaders of disbelief, for indeed, there are no oaths [sacred] to them; [fight them that] they might cease.
An-Nisa' 4:62
فَكَيْفَ إِذَآ أَصَٰبَتْهُم مُّصِيبَةٌۢ بِمَا قَدَّمَتْ أَيْدِيهِمْ ثُمَّ جَآءُوكَ يَحْلِفُونَ بِٱللَّهِ إِنْ أَرَدْنَآ إِلَّآ إِحْسَٰنًا وَتَوْفِيقًا
So how [will it be] when disaster strikes them because of what their hands have put forth and then they come to you swearing by Allah, "We intended nothing but good conduct and accommodation."
Al-Qalam 68:10
وَلَا تُطِعْ كُلَّ حَلَّافٍ مَّهِينٍ
And do not obey every worthless habitual swearer.
Al-Qalam 68:11
هَمَّازٍ مَّشَّآءٍۭ بِنَمِيمٍ
[And] scorner, going about with malicious gossip -
Al-Qalam 68:12
مَّنَّاعٍ لِّلْخَيْرِ مُعْتَدٍ أَثِيمٍ
A preventer of good, transgressing and sinful,
Al-Qalam 68:13
عُتُلٍّۭ بَعْدَ ذَٰلِكَ زَنِيمٍ
Cruel, moreover, and an illegitimate pretender.
Al-Qalam 68:14
أَن كَانَ ذَا مَالٍ وَبَنِينَ
Because he is a possessor of wealth and children,
Al-Qalam 68:15
إِذَا تُتْلَىٰ عَلَيْهِ ءَايَٰتُنَا قَالَ أَسَٰطِيرُ ٱلْأَوَّلِينَ
When Our verses are recited to him, he says, "Legends of the former peoples."
Al-Qalam 68:16
سَنَسِمُهُۥ عَلَى ٱلْخُرْطُومِ
We will brand him upon the snout.
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